TYPO3 Core

In our backend module layout there is the familiar HTML structure:

<div id="typo3-docbody">
   <div id="typo3-inner-docbody">
    <f:flashMessages />
    <f:render section="content" />
   </div>
</div>

But in version 11.5 (first trial with 11 - no clue about the behaviour of 11.4) in the backend.css the styles for #typo3-docbody are missing. This leads to overlapping of content with the doc header.

In version 10 there are these lines (expanded backend.css)

div#typo3-docbody {
    bottom: 0;
    overflow: auto;
    position: absolute;
    top: 51px;
    width: 100%
}

@media print {
    div#typo3-docbody {
        overflow: visible
    }
}