Primefaces: DataTable LadyModel within a Dynamic TabView

I am using Primefaces 5.2. and I have a tabview Dinamic and inside every Tab created, a DataTable . After I sort a column, or do any pagination action on the table and change from Tab , I come up with the following nullpointer :

  

java.lang.NullPointerException at   org.primefaces.component.datatable.DataTable.findColumnInGroup (DataTable.java:905)     at   org.primefaces.component.datatable.DataTable.findColumn (DataTable.java:896)     at   org.primefaces.component.datatable.DataTable.getSortColumn (DataTable.java:1401)     at   org.primefaces.component.datatable.DataTable.resolveSortField (DataTable.java:1020)     at   org.primefaces.component.datatable.DataTable.loadLazyData (DataTable.java:972)     at   org.primefaces.component.datatable.DataTableRenderer.preRender (DataTableRenderer.java:95)     at   org.primefaces.component.datatable.DataTableRenderer.encodeEnd (DataTableRenderer.java:83)

By debugging source of primefaces , I checked that the findColumnInGroup method is looking for the column in Tab Wrong.

Example: When I change from Tab 0 to Tab 2 in my TabView , and do any select action on my DataTable , it looks for a column with id: Tabview2:blabla , but when I sort and mute to Tab 1 , it is looking for the column with id Tabview0:blabla , it's like Tab to go back to 0 .

Another problem I encountered is that when I change from Tab , my DataTable is not returning to the initial state. Have you ever come across this ?

 <p:tabView dynamic="true" cache="true" tabindex="#{VMConflito.indexTabConflitos}" widgetVar="tabView" id="tabView" value="#{VMConflito.totalConflitos}" var="tc">
                        <p:ajax event="tabChange" listener="#{VMConflito.buscarConflitos(tc)}"  update="@this" />
                        <p:tab title="#{tc.entidade} (#{tc.totalConflitos})" >                           
                            <p:dataTable id="tabela" emptyMessage="sem registros" lazy="true" value="#{VMConflito.conflitos}" var="conflito"
                                         paginator="true" paginatorPosition="bottom" rows="10" paginatorTemplate="{RowsPerPageDropdown} {FirstPageLink} {PreviousPageLink} {CurrentPageReport} {NextPageLink} {LastPageLink}"
                                         rowsPerPageTemplate="10, 20, 30" selectionMode="single" styleClass="tabela-cor" rowKey="#{conflito.id}">

                                <p:column headerText="ID" sortBy="#{conflito.id}">
                                    <h:outputLabel value="#{conflito.id}" />
                                </p:column>
                                <p:column headerText="instante do conflito" sortBy="#{conflito.instanteConflito}">
                                    <h:outputLabel value="#{conflito.instanteConflito}" >
                                        <f:converter converterId="localDateTime" />
                                    </h:outputLabel>
                                </p:column>
                                <p:column headerText="similaridade calculada" sortBy="#{conflito.similaridade}">
                                    <h:outputLabel value="#{conflito.similaridade}" />
                                </p:column>
                                <p:column headerText="id criado">
                                    <h:outputLabel value="#{conflito.entidadeId}" />
                                </p:column>
                                <p:column headerText="id candidato">
                                    <h:outputLabel value="#{conflito.conflitoId}" />
                                </p:column>
                                <p:column style="width: 70px!important;" >
                                    <p:commandButton value="Ver" styleClass="cores-claras" >
                                        <p:ajax event="click" 
                                                update="painel" listener="#{VMConflito.setConflito(conflito)}"  />
                                    </p:commandButton>
                                </p:column>
                            </p:dataTable>
                        </p:tab>
                    </p:tabView>