[GH-ISSUE #1704] iOS topic selection hang #1185

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opened 2026-05-07 00:30:53 +02:00 by BreizhHardware · 0 comments

BreizhHardware commented

2026-05-07 00:30:53 +02:00

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Originally created by @am7590 on GitHub (Apr 14, 2026).
Original GitHub issue: https://github.com/binwiederhier/ntfy/issues/1704

🐞 Describe the bug
Opening a topic can be slow or cause hangs when the device has a large backlog of delivered notifications

💻 Components impacted
iOS

💡 Screenshots and/or logs

Open the iOS app after 200+ unread notifications
Tap a topic
Topic view opens slowly / app appears hung for a few seconds. Or crashes

🔮 Additional context

When a topic is tapped, NotificationListView calls cancelSubscriptionNotifications()
This fetches all delivered system notifications on the device, filters them in memory, and removes matches for the selected topic
This causes main thread unresponsiveness

Originally created by @am7590 on GitHub (Apr 14, 2026). Original GitHub issue: https://github.com/binwiederhier/ntfy/issues/1704 :lady_beetle: **Describe the bug** Opening a topic can be slow or cause hangs when the device has a large backlog of delivered notifications :computer: **Components impacted** iOS :bulb: **Screenshots and/or logs** - Open the iOS app after 200+ unread notifications - Tap a topic - Topic view opens slowly / app appears hung for a few seconds. Or crashes :crystal_ball: **Additional context** - When a topic is tapped, NotificationListView calls cancelSubscriptionNotifications() - This fetches all delivered system notifications on the device, filters them in memory, and removes matches for the selected topic - This causes main thread unresponsiveness