I do have a business account and plus account under the same logins. It was done this way so I could keep my personal stuff seperated from business. However I do use codex on both accounts because I do some stuff for work which I keep to their account and my stuff to my own account. However recently when ive hit the 5 hour window, I have switched to personal to finish off what I was doing.
I have also wipped out ~/.codex and even ~/.vscode thinking maybe something simular to what you mentioned, but more about possible corruption but this made no difference.