Is this still happening for you? Votes have dropped off so I hope this has resolved. Please let me know!
Please comment in this thread your response.
An error occurred while saving the commentTeemu commented
It has been fixed for a while now
As the last status states, we have been testing for several months. Although many people have asked for this feature, we received a similar amount of feedback from other users that they prefer the Teams notifications and don’t want them changed. We are currently testing a feature for users to choose between Teams notifications & Windows notifications.
We will update you as work progresses.