Alignment tool random noises

Hi everyone. I recently starting using a bit more the alignment tool for backing vocals and doubled lead vocal tracks.
I have this random issue were after i make some alignments the audio gets a bit glitchy on random locations.
What i normally do is to consolidate those edits on a new track version to keep safe the original audio.
I asked a friend of mine how uses Cubase 10.5 and he said that such thing never happens to him.
Can anyone confirm if this is a 11 version bug ?