We're sorry about the trouble there, Ahmed. By default, we begin sending out push notifications 10 minutes after we stop detecting cursor activity on the desktop app, plus any time you have set up as a notifications delay. Do you receive mobile notifications after this time?
There is a section on this page about Notification Timing that will solve that for you!https://slack.com/intl/en-ca/help/articles/360025446073-Guide-to-mobile-notifications#configure-your-notifications …