I am having this same issue which started happening in 2019 Lacerte. Primary/Master options are set to force upper case as are my user options and even if I change the miscellaneous options for the client file it doesn't make a difference. The only fix is to go out of the return and close the program to reopen and once reoppened it will work only to at some point start acting screwy again.

I spoke to someone who wanted me to delete and recreate my options but it didn't make a difference.

This is incredibly frustrating!