QtCreator has undesired default shortcuts conflicting with my usual shortcuts. This resolves by clearing conflicted shortcuts, but this takes effects as long as QtCreator is open. After reopening conflicts are back again.
Im not sure if they are all reverts, but for sure these are: CutLine, IncreaseFontSize.
For example, i rebind shift+delete on DeleteLine, and clear CutLine which is default shift+delete. It works as expected. But after QtC restart, shift+delete is not working at all due to conflict.