Hello,
My theme call youplay and not Twenty Twenty One.
When I had this problem, I thought firstly is from the theme. So I contacted the support and they told me that’s not from the theme and ask me to do exactly like you describe in your message.
The problem returns only when I activate Translate Multilingual sites – TranslatePress and only when the website language is french. In English mode, I don’t have the problem.
Thank you