Rich Benner diagnoses an issue:
We’ve recently come up across a fun little bug with log shipping in contained availability groups. A cursory Google search did not bring up any useful posts for troubleshooting, so here we are. If you’re here for the bug, feel free to scroll to the bottom of this post. For the rest of you, however, let’s add a little context to this scenario before getting to the meat of the situation.
Click through for the issue, as well as how Rich was able to resolve the problem.