Slack messages disappear or fail to deliver
Slack notifications appear then vanish, or messages are not delivered at all intermittently.
Signal
Visibility
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Similar Problems
surfaced semanticallySlack Silently Stops Delivering New Messages Until App Is Restarted
On systems that have not been restarted in several weeks, Slack silently stops receiving new messages without any error or alert. Users only discover the failure when they restart the app and see unread messages that should have arrived earlier. This silent delivery failure is a high-severity reliability issue for teams that depend on Slack for real-time communication.
Slack Notifications Missed After Laptop Restart When App Fails to Reopen
Users miss Slack notifications when their laptop restarts and Slack does not automatically reopen. Critical messages go unseen until the app is manually launched.
Slack huddle and thread notifications disappear before users can act on them
Slack notifications for huddle invitations appear briefly then vanish without any missed-activity indicator, causing users to miss real-time collaboration events. Thread activity is also not surfacing correctly in some configurations. Users have no reliable audit of what notifications were received and dismissed versus never shown.
Slack Thread Sync Lags and Threads Fail to Open
Slack messages and thread updates fail to sync promptly even on active connections, and some threads refuse to open entirely. The unreliability directly disrupts async team communication workflows.
Slack Mobile Push Notifications Stop Delivering Mid-Day Without Warning
Slack mobile notifications fire reliably for a period then silently stop for the remainder of the day, causing users to miss messages entirely. The failure is intermittent and non-obvious, making it difficult to diagnose or work around. This is a critical reliability gap for remote teams depending on mobile alerts.
Problem descriptions, scores, analysis, and solution blueprints may be updated as new community data becomes available.