Material preview image is not always shown correctly inside 3D component

Steps to rperoduce:

• Create 3D project (Qt6.4 target)
• Import the attached 3D Asset QtLogo.fbx
• Double click Qtlogo in Components to go inside component
• Open Material Browser and Material Editor
• Material preview image not shown correctly, see the attached picture
• Create another material by clicking + in Material Editor
• -> Preview image for logomat_material seems to update now in Material Browser, but preview image for New Material is missing both in Material Editor and Material Browser
• Tested also with other 3D asset (Balls.dae) and issue did not reproduce with that.