Elements disappear when you enter responsive mode and only appear when you click on it

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As soon as my page loads, all the elements that fit on the screen are rendered, but when I scroll down a bit, the elements are not shown, only rendered when I click on them, and when this element is shown, another element on the top some (?)

  • Page when it loads shows all the elements that fit the screen:
  • When I scroll down the page I notice that the elements are not showing:
  • Clicking on the element is rendered:
  • Has anyone ever gone through this? I tried some things like:

    I checked that the divs are closing correctly where they should;
    I checked for identical ids;
    I checked if all ngmodel variables exist in ts.

    I'm not sure what to do.

        
    asked by anonymous 24.10.2018 / 17:30

    1 answer

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    For those who are interested, I use the bootstrap design material and when I changed their card to position: sticky, the elements were rendered as expected. I did not understand very well because it worked

        
    24.10.2018 / 17:45