Here is what eventually happened:
After 4 hours, my internal testing group was suddenly added to the new build and the number of Invites was updated and when I opened the TestFlight app, the build was there. But I did not receive any emails or TestFlight or App Store Connect notifications telling me that the build was available.
achristy@msicorp.com
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Last seen
User for
Post
Replies
Boosts
Views
Activity
I am experiencing this issue as well. Any updates on how to fix?