columns of keys and alterations pops after a transposition

There's a bug when doing a transpostition. It changes the page settings, but entire columns of the former Keys and keys signature appears in the middle of a line (there are actually placed where there was, previous to the transposition, a beginning of a line with all its Keys and key signature.). It's impossible to delete them manually. They don't affect the playback, which plays in the current tonality even as the key signature features the old one. This bug can be seen only in the general score and not in parts. Please See the screenshot.