Are you aware of any issue or new restriction introduced recently to log on Subscriber?
I granted access to our company, logged out, and then logged in our LMA, then I opened the Subscriber using the org id, but then it shows no entry to log-in.
Is this a Salesforce issue that might be happening?
I am asking because a few days ago I used the exact same feature (Log In to Subscriber Orgs) and it worked, for the same org, etc.