Just a wild thought here, but have you tried clearing the whole old description (keep a copy just in case), save, then tried to paste the whole thing again? With or without restarting the app after saving the empty description.
Have you tried to paste it bit by bit and save? Maybe there’s a character limit you are exceeding.
Have you tried without emojis first? Maybe it’s just an unknown problem with emojis.
If nothing works, maybe you could painfully copy it manually. I know it sucks and I’d hate to do it too but it may be the solution for now
I’m not a team leader so I can’t experiment, but I’m stubborn. If something doesn’t work I try to find loopholes. I hope these tricks might help you get that description fixed!
(Don’t listen to people telling you to start a new team, a crappy description isn’t worth the trouble )