The upstream patch to fix this very annoying bug is here: https://github.com/qt/qtbase/commit/acaabc9108dfe75530960cf8e3ec4f3602cd82e0.patch
I’m not too acquainted with Debian packaging, but I think adding it in https://invent.kde.org/neon/qt/qtbase/-/tree/Neon/release/debian/patches and rebuilding the framework snap(s) should do the trick.