Another user is already logged into the application on this client - Anyone else experiencing this?

Hi OS Community. 

has anyone encountered this error when logging into OneStream? "Another user is already logged into the application on this client. That user must log out of their external identity provider before you can log in."

I ran into this issue today with a user and wanted to see if anyone has experienced the same thing and found a fix.  Any help or suggestions would be greatly appreciated. Thank you!

Edit: I found a similar post from past [ Unable to Login into OneStream]  where it was suggested to log out of the organizational SSO account, but just wondering if there's a permanent fix or root cause of this.