QDockWidget; dock window "jumps" to wrong location when undocked instead of following cursor position

Dock Widgets Example can be used to reproduce the issue. When being dragging and undocked, dock window "jumps" to a wrong position instead of following cursor position. See the attached gif.

The problem is only observed for 6.2.10. Also tried 5.15.15, 6.5.3 and 6.6.0 - no buggy behavior.

I've searched around, https://bugreports.qt.io/browse/QTBUG-106530 is similar but not sure if it is related by any means. I've checked the source code of 6.2.10 and confirmed that it is patched for that bug.

6.2 is a LTS version so I think it deserves a fix.