Create a new user account – As with the vast majority of taskbar issues (especially on Windows 11), the cure-all fix is to simply create a new user account.
With the new information at our disposal, this is probably effective because it forces the Microsoft Teams pop-up to remain disabled.
De-Sync the date & time – Some affected users have confirmed that the issue goes away once you de-sync the date and time with the Microsoft Server.
This fix has been confirmed to be successful by a lot of affected users. By uninstalling it, you’re also forcing your OS to roll back any change it made once the update came along.
Uninstalling the KB5006050 update – The update that might this error so prevalent is KB5006050.
This fix involves the modification of the registry in order to terminate and reset the service responsible for this issue (Iris Service).
Deal with the IRIS Service bug via a Task Manager task – This is the official fix made public by Microsoft a few weeks after it was clear that the issue is extremely widespread.