I noticed that copy/paste in Gmail web in Safari just messes up very visibly the text style, including for simple plain text (no style attached!) you just move

I noticed that copy/paste in Gmail web in Safari just messes up very visibly the text style, including for simple plain text (no style attached!) you just move around. Had to systematically use Alt-Cmd-Shift-V to workaround it (paste without formatting), as this is the only option around mentioned in forums... Anyone has the same weird behavior here ? (Google, please fix it!)