Cannot connect as guest after migrating email

I used to have an email address that was associated with a Microsoft account which was added to a company's Teams as a guest account. I have changed domains and added the old email address as an alias. They have attempted to add my new email address to their team.

What happens when I log in on desktop is that I am greeted with an invitation to join the organization. I click "continue", and it tries to load for a minute before kicking me back to the invitation screen. On mobile, I can see the new organization in the list but it tells me that I cannot switch to it.

I'm not sure where to report this bug, so if there's a better place than here please let me know.