Gnome on Wayland: Right click empties the clipboard

When using Gnome on Wayland, right click empties the clipboard. Only happens when the clipboard was filled from different application than the target.

The clipboard still has its original content visible for other applications, and can be made work again for the Qt application as well by moving it out of focus and back in.

Minimal reproducer available here: https://gitlab.com/Urpelainen/qt-clipboard-rightclick-reproducer

Original problem that was distilled to this report: https://bugzilla.redhat.com/show_bug.cgi?id=1954181

It may be that the Gnome bug tracker would be a better home for this bug. Unfortunately, I do not have the expertise to determine if it is so.