I did some tests but the same error doesn't occur.
my test environment:
If possible, try updating PowerPoint and let me know the result.
Best Regards, Gao Community Support Team
If there is any posthelps, then please considerAccept it as the solutionto help the other members find it more quickly. If I misunderstand your needs or you still have problems on it, please feel free to let us know.Thanks a lot!