Hello @AZMike2021
Thank you for reaching out on the community and telling us about your issue. I do apologize for the issue you're having. That is odd that it would change after so long. A way to test if your theory is correct is we could try adding the accounts to a test file to see if they have similar issue. I'll leave steps down below.
Don't use any of these characters: * ? < > | " : \ / (asterisk, question mark, left and right-angle bracket, pipe, straight quotation marks, colon, BACKSLASH, FORWARD SLASH). Also, don't add the .qdf extension; Quicken does that for you.
After adding accounts, see if you are experiencing the same problems in this test file. Once you're able to let us know more we'll see what we can do.
Thanks,
Quicken Francisco