Test connection successful but Inbound Emails are empty

I have followed the following resource to implement inbound emails for oauth 2.0

The test connection is successful :

After this when I open Email module, I find it to be empty.

It should have fetched the email of the particular accounts I mentioned during the configuration.

Update :
So when I copy the id of a particular inbound email i.e id=7b5d19f7-a35b-7f65-983c-63bbb19b2330 and then paste it in the following url , then I get to have the emails


But when I will log out and would simple click the email module, then again the emails are EMPTY!