Crash of application when resizing

I have a strange resizing behaviour in my application on windows 11 and Qt 6.4.1. I use a combination of ColumnLayout which inherits 2 GridLayouts with TextFields and Comboboxes. The width of ColumnLayout is parent.width the width of GridLayout is Layout.fillWidth: true. The GridLayout has two columns and the controls in it combine preferredWidth: 1 and fillWidth: true to have columns with the same size. When I now resize the application the application freezes and finally a crash occurs. With Qt 5.15.x all went fine.

Tried to create a minimal example.... Inherited parts of my app framework (qml files) that represent the UI stuff of my applets (mini programs), got it running but this example is not crashing.... Think there are more complex things going on in the background.... Do not know how to provide more feedback regarding this....

Tried with Qt 6.2.6 and things are working as expected, so with Qt 6.2.6 resizing works like with Qt 5.15.10