When opening Azure Document Intelligence, it opens in external directory. Then its impossible to change to the right one.

I created an external directory in Entra ID to add B2B customers to my App. Now I have two directories/ tenants in my Azure Portal. My main one and my external one. The problem is, that when I open Document Intelligence Studio I get logged in the external one, which has no authorisation to use Document Intelligence Studio. When I want to change to the right directory I get a "InteractionRequiredAuthError" which changes to a prompt asking me to "sign in with a different account" once per second, making it impossible to do anything.

Is there any fix for example in stopping Document Intelligence to start with the external directory? Another issue could be that maybe my work email (karim@steady.insure) isnt authenticated properly by Document Intelligence Studio?

Thanks for any help!