Corrupted Slack application cache – As some users have reported, as cached data piles up, you might start noticing delays in the deliverance of notification.To resolve this issue, you’ll need to either disable this mode completely or modify its settings to reflect your own working hours. Do Not Disturb mode is preventing the notifications from going through – The Do Not Disturb mode is designed to spare you from receiving notifications during resting hours, but if you’re working with a team that has a different timezone, this mode might kick in during your working hours.In this case, enabling notifications for All new messages and ensuring that they get delivered through Windows Action Center should resolve the issue in this particular scenario. Desktop notifications are disabled for Slack – You might not be seeing Slack notifications because the Slack notification functionality is disabled from Slack’s settings menu.

If you got a lot of Slack notifications and ignored all of them, you will start seeing less and less of them until you start showing interest. Notifications Manager has determined that Slack notifications are not important – The notification manager on Windows 10 got smart, meaning that it will decide on the notifications that go through based on the user interest.

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