[Not always reproducible]Resizing QWebEngineView mistakenly offsets the entire widget

First thing first, I cannot reproduce the issue. Customer also says that he tried on multiple devices and there are both reproducible and irreproducible cases. So, one may or may not be able to reproduce the problem.

The problem seems to be related to resizing QWebEngineView. One can try Qt 6.5.4 simple browser or nano browser example on Windows. It is said that the entire widget (tab bar + tool bar + entire web page) is shifted toward top-left corner (see the attached screenshot). The offset keeps appearing and disappearing during resizing and stays as is after resizing. Dragging top-level window around then offset is gone.

It is not like the "rendering delay" during resizing, i.e. the lower-right corner is not rendered immediately as resizing is happening. The "delay" does not offset anything - it is just a blank area. And it does not stay after resizing. This sort of "delay" is somewhat expected due to hardware specs. But the "offset" is something different.