Hi All,
After confirming with our related resources, they believe this issue should be fixed in the Office for Mac version 16.31.
However, currently the version 16.31 is only available for the insider users.
For your reference:
Join the Office Insider for Mac
Note: Please read the description for Insider Fast and Insider
Slow carefully before you decide to opt-in to Office Insider Program.
Also, the version 16.31 should be release to the production channel soon in the future, if you don't want to join the Insider Program, please patiently
wait for the next update release.
Thanks for your understanding. Please keep us informed if you have further concern.
Regards,
Alex Chen