So here's an interesting little problem. We recently updated to Conf 5.3.1 from Conf 4, and we're noticing that some users' personal spaces are no longer connected to their accounts.
The spaces are still there and still functioning, but all the pages say they were created by "anonymous", and those users have the option to add a personal space in their top-bar dropdown. Though when they try it just hangs indefinitely.
It's happened with a majority of our users, but not all of them.