Report iReport does not include the fields in the Summary tab

In the management system I'm working on, I generate a PDF non-fiscal thermal printer voucher made in iReport using the PHPJasperXML library. In this voucher, when you have only one product (one row) in the Detail tab, the Summary fields are blank. When you have two or more products (two rows or more) in the Detail tab, the fields are filled in normally. In the preview of the iReport program it works perfectly, with one or two products.

Follow the report's jrxml (only the detail and summary):

<detail>
    <band height="25" splitType="Stretch">
        <textField isStretchWithOverflow="true">
            <reportElement x="0" y="0" width="186" height="12" uuid="e06c4bc6-e0f7-4e0e-8a7b-ab5ce1fd5e62"/>
            <box>
                <pen lineWidth="0.25" lineColor="#999999"/>
                <topPen lineWidth="0.25" lineColor="#999999"/>
                <leftPen lineWidth="0.25" lineColor="#999999"/>
                <bottomPen lineWidth="0.25" lineColor="#999999"/>
                <rightPen lineWidth="0.25" lineColor="#999999"/>
            </box>
            <textElement verticalAlignment="Middle">
                <font size="7" isBold="false"/>
                <paragraph leftIndent="5"/>
            </textElement>
            <textFieldExpression><![CDATA[$F{descricao}]]></textFieldExpression>
        </textField>
        <textField pattern="#,##0.00;-#,##0.00">
            <reportElement x="52" y="12" width="67" height="12" uuid="1d928a34-4972-4204-9612-9f0e8a6749d3"/>
            <box>
                <pen lineWidth="0.25" lineColor="#999999"/>
                <topPen lineWidth="0.25" lineColor="#999999"/>
                <leftPen lineWidth="0.25" lineColor="#999999"/>
                <bottomPen lineWidth="0.25" lineColor="#999999"/>
                <rightPen lineWidth="0.25" lineColor="#999999"/>
            </box>
            <textElement textAlignment="Center" verticalAlignment="Middle">
                <font size="7"/>
                <paragraph rightIndent="5"/>
            </textElement>
            <textFieldExpression><![CDATA[$F{valor}]]></textFieldExpression>
        </textField>
        <textField pattern="#,##0.00;-#,##0.00">
            <reportElement x="0" y="12" width="52" height="12" uuid="f6d30d04-d0fe-4dd3-a675-377ff6d2b473"/>
            <box>
                <pen lineWidth="0.25" lineColor="#999999"/>
                <topPen lineWidth="0.25" lineColor="#999999"/>
                <leftPen lineWidth="0.25" lineColor="#999999"/>
                <bottomPen lineWidth="0.25" lineColor="#999999"/>
                <rightPen lineWidth="0.25" lineColor="#999999"/>
            </box>
            <textElement textAlignment="Center" verticalAlignment="Middle">
                <font size="7"/>
                <paragraph rightIndent="5"/>
            </textElement>
            <textFieldExpression><![CDATA[$F{quantidade}]]></textFieldExpression>
        </textField>
        <textField pattern="#,##0.00;-#,##0.00">
            <reportElement x="119" y="12" width="67" height="12" uuid="0603e3b7-801d-49af-9a06-5d33023c5277"/>
            <box>
                <pen lineWidth="0.25" lineColor="#999999"/>
                <topPen lineWidth="0.25" lineColor="#999999"/>
                <leftPen lineWidth="0.25" lineColor="#999999"/>
                <bottomPen lineWidth="0.25" lineColor="#999999"/>
                <rightPen lineWidth="0.25" lineColor="#999999"/>
            </box>
            <textElement textAlignment="Center" verticalAlignment="Middle">
                <font size="7"/>
                <paragraph rightIndent="5"/>
            </textElement>
            <textFieldExpression><![CDATA[$F{subtotal}]]></textFieldExpression>
        </textField>
    </band>
</detail>
<summary>
    <band height="203">
        <staticText>
            <reportElement mode="Opaque" x="0" y="82" width="85" height="16" backcolor="#CCCCCC" uuid="6b173bab-525a-4da5-a564-723a8cbb1fbc"/>
            <box>
                <pen lineWidth="0.25" lineColor="#999999"/>
                <topPen lineWidth="0.25" lineColor="#999999"/>
                <leftPen lineWidth="0.25" lineColor="#999999"/>
                <bottomPen lineWidth="0.25" lineColor="#999999"/>
                <rightPen lineWidth="0.25" lineColor="#999999"/>
            </box>
            <textElement verticalAlignment="Middle">
                <font size="7" isBold="true"/>
                <paragraph leftIndent="5"/>
            </textElement>
            <text><![CDATA[R$ TROCO:]]></text>
        </staticText>
        <staticText>
            <reportElement x="0" y="3" width="53" height="12" uuid="c99a6844-ca28-47c7-a022-80d2717bf547"/>
            <textElement textAlignment="Center" verticalAlignment="Bottom">
                <font size="7"/>
                <paragraph leftIndent="5"/>
            </textElement>
            <text><![CDATA[Emissão:]]></text>
        </staticText>
        <staticText>
            <reportElement mode="Opaque" x="0" y="66" width="85" height="16" backcolor="#CCCCCC" uuid="d0b8947e-8183-4a55-8b6d-f238bdac0404"/>
            <box>
                <pen lineWidth="0.25" lineColor="#999999"/>
                <topPen lineWidth="0.25" lineColor="#999999"/>
                <leftPen lineWidth="0.25" lineColor="#999999"/>
                <bottomPen lineWidth="0.25" lineColor="#999999"/>
                <rightPen lineWidth="0.25" lineColor="#999999"/>
            </box>
            <textElement verticalAlignment="Middle">
                <font size="7" isBold="true"/>
                <paragraph leftIndent="5"/>
            </textElement>
            <text><![CDATA[R$ TOTAL REC.:]]></text>
        </staticText>
        <textField pattern="#,##0.00;-#,##0.00">
            <reportElement isPrintRepeatedValues="false" x="85" y="82" width="101" height="16" uuid="a15e9cba-0f96-42be-8071-dbd7afecf73a"/>
            <box>
                <pen lineWidth="0.25" lineColor="#999999"/>
                <topPen lineWidth="0.25" lineColor="#999999"/>
                <leftPen lineWidth="0.25" lineColor="#999999"/>
                <bottomPen lineWidth="0.25" lineColor="#999999"/>
                <rightPen lineWidth="0.25" lineColor="#999999"/>
            </box>
            <textElement textAlignment="Right" verticalAlignment="Middle">
                <font size="7"/>
                <paragraph rightIndent="5"/>
            </textElement>
            <textFieldExpression><![CDATA[$F{troco}]]></textFieldExpression>
        </textField>
        <textField pattern="#,##0.00;-#,##0.00">
            <reportElement isPrintRepeatedValues="false" x="85" y="34" width="101" height="16" uuid="47411e66-b385-427c-825c-3be4e4abe45e"/>
            <box>
                <pen lineWidth="0.25" lineColor="#999999"/>
                <topPen lineWidth="0.25" lineColor="#999999"/>
                <leftPen lineWidth="0.25" lineColor="#999999"/>
                <bottomPen lineWidth="0.25" lineColor="#999999"/>
                <rightPen lineWidth="0.25" lineColor="#999999"/>
            </box>
            <textElement textAlignment="Right" verticalAlignment="Middle">
                <font size="7"/>
                <paragraph rightIndent="5"/>
            </textElement>
            <textFieldExpression><![CDATA[$F{desconto}]]></textFieldExpression>
        </textField>
        <staticText>
            <reportElement mode="Opaque" x="0" y="34" width="85" height="16" backcolor="#CCCCCC" uuid="05f791f7-9e38-4ee2-b7db-8e1ec1d6275f"/>
            <box>
                <pen lineWidth="0.25" lineColor="#999999"/>
                <topPen lineWidth="0.25" lineColor="#999999"/>
                <leftPen lineWidth="0.25" lineColor="#999999"/>
                <bottomPen lineWidth="0.25" lineColor="#999999"/>
                <rightPen lineWidth="0.25" lineColor="#999999"/>
            </box>
            <textElement verticalAlignment="Middle">
                <font size="7" isBold="true"/>
                <paragraph leftIndent="5"/>
            </textElement>
            <text><![CDATA[R$ DESCONTO:]]></text>
        </staticText>
        <staticText>
            <reportElement mode="Opaque" x="0" y="18" width="85" height="16" backcolor="#CCCCCC" uuid="3c260ede-9083-41f2-aa35-b2e044fc645a"/>
            <box>
                <pen lineWidth="0.25" lineColor="#999999"/>
                <topPen lineWidth="0.25" lineColor="#999999"/>
                <leftPen lineWidth="0.25" lineColor="#999999"/>
                <bottomPen lineWidth="0.25" lineColor="#999999"/>
                <rightPen lineWidth="0.25" lineColor="#999999"/>
            </box>
            <textElement verticalAlignment="Middle">
                <font size="7" isBold="true"/>
                <paragraph leftIndent="5"/>
            </textElement>
            <text><![CDATA[R$ SUBTOTAL:]]></text>
        </staticText>
        <textField>
            <reportElement x="52" y="3" width="134" height="12" uuid="47291c92-c9d1-40ac-a8d8-82247f26f98b"/>
            <textElement verticalAlignment="Top">
                <font size="7"/>
                <paragraph leftIndent="5"/>
            </textElement>
            <textFieldExpression><![CDATA[$F{hoje}]]></textFieldExpression>
        </textField>
        <textField pattern="#,##0.00;-#,##0.00">
            <reportElement isPrintRepeatedValues="false" x="85" y="66" width="101" height="16" uuid="798cef8b-50c8-437b-af79-95526dbcd315"/>
            <box>
                <pen lineWidth="0.25" lineColor="#999999"/>
                <topPen lineWidth="0.25" lineColor="#999999"/>
                <leftPen lineWidth="0.25" lineColor="#999999"/>
                <bottomPen lineWidth="0.25" lineColor="#999999"/>
                <rightPen lineWidth="0.25" lineColor="#999999"/>
            </box>
            <textElement textAlignment="Right" verticalAlignment="Middle">
                <font size="7"/>
                <paragraph rightIndent="5"/>
            </textElement>
            <textFieldExpression><![CDATA[$F{total_rec}]]></textFieldExpression>
        </textField>
        <textField pattern="#,##0.00;-#,##0.00">
            <reportElement isPrintRepeatedValues="false" mode="Transparent" x="85" y="18" width="101" height="16" uuid="ac0e949b-93f4-4ded-a654-97230a33cb20"/>
            <box>
                <pen lineWidth="0.25" lineColor="#999999"/>
                <topPen lineWidth="0.25" lineColor="#999999"/>
                <leftPen lineWidth="0.25" lineColor="#999999"/>
                <bottomPen lineWidth="0.25" lineColor="#999999"/>
                <rightPen lineWidth="0.25" lineColor="#999999"/>
            </box>
            <textElement textAlignment="Right" verticalAlignment="Middle">
                <font size="7" isBold="false" isItalic="false" isUnderline="false" isStrikeThrough="false"/>
                <paragraph rightIndent="5"/>
            </textElement>
            <textFieldExpression><![CDATA[$F{total_prod}]]></textFieldExpression>
        </textField>
        <textField pattern="#,##0.00;-#,##0.00">
            <reportElement isPrintRepeatedValues="false" x="85" y="50" width="101" height="16" uuid="98a37383-f178-4e9b-817a-66c3ebe183a5"/>
            <box>
                <pen lineWidth="0.25" lineColor="#999999"/>
                <topPen lineWidth="0.25" lineColor="#999999"/>
                <leftPen lineWidth="0.25" lineColor="#999999"/>
                <bottomPen lineWidth="0.25" lineColor="#999999"/>
                <rightPen lineWidth="0.25" lineColor="#999999"/>
            </box>
            <textElement textAlignment="Right" verticalAlignment="Middle">
                <font size="7"/>
                <paragraph rightIndent="5"/>
            </textElement>
            <textFieldExpression><![CDATA[$F{total_venda}]]></textFieldExpression>
        </textField>
        <textField isStretchWithOverflow="true">
            <reportElement positionType="Float" stretchType="RelativeToBandHeight" x="0" y="102" width="186" height="98" isPrintWhenDetailOverflows="true" uuid="85f18504-1690-48ae-a11a-02a6b0ef4489"/>
            <box>
                <pen lineColor="#999999"/>
                <topPen lineColor="#999999"/>
                <leftPen lineColor="#999999"/>
                <bottomPen lineColor="#999999"/>
                <rightPen lineColor="#999999"/>
            </box>
            <textElement markup="none">
                <font size="7" isPdfEmbedded="false"/>
            </textElement>
            <textFieldExpression><![CDATA[$F{pagamentos_venda}]]></textFieldExpression>
        </textField>
        <staticText>
            <reportElement mode="Opaque" x="0" y="50" width="85" height="16" backcolor="#CCCCCC" uuid="1fc6ac4f-3090-4de5-8fd6-7562b4058ecf"/>
            <box>
                <pen lineWidth="0.25" lineColor="#999999"/>
                <topPen lineWidth="0.25" lineColor="#999999"/>
                <leftPen lineWidth="0.25" lineColor="#999999"/>
                <bottomPen lineWidth="0.25" lineColor="#999999"/>
                <rightPen lineWidth="0.25" lineColor="#999999"/>
            </box>
            <textElement verticalAlignment="Middle">
                <font size="7" isBold="true"/>
                <paragraph leftIndent="5"/>
            </textElement>
            <text><![CDATA[R$ TOTAL:]]></text>
        </staticText>
        <line>
            <reportElement x="0" y="0" width="186" height="1" uuid="e3ab1d85-d813-4fe6-ba0d-70c9bf390b79"/>
        </line>
    </band>
</summary>

View the results in PDF:

1 - With a product:

2-Withtwoproducts:

The values are already ready from the MySQL database, nothing is changed or incremented within the Summary. I already tried with parameter and variable but it did not work.

Does anyone have any ideas? Would it be a problem in the report or some server configuration?

Thank you in advance!