No painting event when changing a virtual desktop in window maker

Hello,

We use debian 12 and window maker as a window manager. Till our last Qt version with Qt 5.15.8, our QGLWidget receive paint event even if we switch one virtual desktop to another one.

Now we use a QOpenGLWidget and update our Qt version to Qt 6.4.2, we encounter an issue where switching one virtual desktop to another does not send paint event anymore. We have tested the behavior on KDE/Xfce, it works fine.

Changing window maker to another window manager is not a solution for us.

With our pipeline, we cannot move some process out of our paint event.

If this issue cannot be solved in future Qt updates (now it concerns only window maker), is there a way to fix this ?