Problem
Users with language set to Portuguese (Brazil) and keyboard layout set to Portuguese (Brazil) or “US International with dead keys” are used to typing a diacritic followed by the space bar to obtain the diacritic itself. After updating to Fedora 43, this no longer happens.
Cause
Not yet known.
Related Issues
Bugzilla report: #2413790
GNOME issue: spacebar no longer clears dead key state in Gnome 49
ibus issue: Dead key followed by space not working correctly after update to Fedora 43
Related discussions:
Workarounds
Use the AltGr key together with the diacritic key to type the diacritic by itself.