@Ed R ,
Could you provide us a screenshot to know your situation clearly if possible?
It recommends you check if you have the appropriate settings of notification. To manage your notifications, select your profile picture in the top right of Teams, then select Settings > Notifications.
For more information, please refer to this article.
Besides, the latest client version is 1.3.00.33674(64-bit). Update your client to the latest version and try again.
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