Hi @kwizera ,
This should be a temporary problem caused by a Microsoft update. Someone reported this the other day. It will fix itself after a while.
Workaround before auto-recovery: If you delete the top part, you can only insert it once and the “problem” is solved.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.