Hello Dear Oum,
I'm glad that you were able to find a workaround that temporarily fixes your problem with the use of "wrap text". However, as of now, i think Microsoft has not released an update yet that would permanently fix this bug/issue. Here in the community, we can only give suggestions and possible solutions to our fellow users that might help them fix their problem to the best of our knowledge. What I can suggest to you for now is to raise this concern through Excel Uservoice. I have seen a related post in this forum and you might want to check this out to see the discussion going on here. But this one talks about MS Word.
https://word.uservoice.com/forums/304942-word-f...
However, I suggest you to create a new post regarding your concern on the Excel for Mac Uservoice Forum through this link:
https://excel.uservoice.com/forums/304933-excel...
This is an official platform where users can send suggestions and ideas to improve their product. We hope you can raise your concerns here to help this issue be fixed on the next version of excel.
I hope I was able to help you in any way and thank you for your understanding.
Kind Regards,
Jen :)