Angular client doesn't gracefully handle user change

[Perustaja]

Scenario:
User has a tab 1 open and is logged in, accessing the website
User opens a copy of tab 1 (tab 2), then logs out and into a separate account
User closes tab 2 and returns to tab 1

Currently the application locks up, ideally it should update and continue on normally with the new user subject & token. Likely an issue in how I am handling the getUser() Observable in the tenant manager service.