Strange behavior when moving window

[jmon1]

Environment

• OS: Windows 11
• Qt Version: 6.10.2
• KDDockWidgets version: downloaded 2 weeks ago from main
• KDDockWidgets: QtWidgets

Self reproducible example

I do not have a simple example to reproduce for the moment.

Description

I am trying KDDockWidget to replace an existing docking solution. The central view is a widget that is OpenGL repainted by a 3rd party software.
The integration went good and the only problem I am facing is described in the following video.

KDDOCKWidgets-2026-05-20-143217.mp4

What is not clear for me is that when you move the floating window outside the main frame the central widget is redrawn perfectly but not when you move over the central widget.

Here is the video with the current docking package.

OtherDockingTool-2026-05-20-142217.mp4

Thanks you.
Best regards.
Jérôme.

[iamsergio]

I've never seen this. I'd have to have access to PAUL to be able to debug it.

[jmon1]

Ok, I will take some hours to prepare a simplified code example, maybe this will help me too !

[jmon1]

I prepared some files in the attached zip to help you to reproduce the problem.

OCCWidgets.zip

Let me know if you have any questions.