Submenus don't show in some conditions. In Qt6 under Wayland.

[krab]

They don't show when there is free space for them to render: https://i.imgur.com/HpXQv9F.png

But they do show when there is no free space to the right to render them: https://i.imgur.com/FuIvmCf.png works correctly.

Tested on Fedora Rawhide like this: QT_STYLE_OVERRIDE=fusion QT_QPA_PLATFORMTHEME=qgnomeplatform qbittorrent

[ghost]

Same happens when running on the following system within Flatpak:

https://github.com/user-attachments/assets/0c8f4097-55c9-43ff-beba-5bd079c5e876