A cloud-based task management app from Microsoft that helps users organize and manage daily tasks across devices.
Based on your description, it appears that Microsoft To Do may not be refreshing the task count on the taskbar in real time, even though the app itself continues to function. Since the same behavior occurs on three different Windows 11 laptops, it is unlikely to be caused by a device-specific issue and may instead be related to the application or a recent update. First, make sure both Microsoft To Do and Windows 11 are fully up to date. You can also try signing out of your Microsoft account in To Do and signing back in to refresh the sync. If the app is slow, especially in the morning, it could be due to background synchronization when the app first starts. If the issue persists after reinstalling and updating, it is likely a bug within Microsoft To Do. I recommend reporting the issue through the Feedback Hub or Microsoft Support so it can be investigated further.
I hope these steps help improve the app's performance and resolve the task count issue.