[Bug] Play/pause button unresponsive when reopening app on iOS

[alex-teder]

Description

If the playback is paused when reopening the iOS app after minimizing it, the play-pause button becomes unresponsive. Tapping the button does not trigger any action—playback does not continue as expected.

Steps to reproduce

1. Open the app and start song playback
2. Pause the song
3. Minimize the app or switch to another app
4. Reopen the app from the background
5. Tap the play-pause button

Expected behavior:

The play-pause button should resume the playback.

Actual behavior:

In the full-screen player the button gets stuck showing "pause" icon (it assumes the audio is currently playing). Pressing it does nothing. In the miniature player UI element the play-pause button disappears altogether.

Resuming the playback from the iOS system widget fixes the playback state, but the issue reproduces itself when reopening the app when the music is paused.

System info

• iOS 18.0
• iPhone XR

[fiver22]

Additional info: I experience this most often (maybe always) when a phone event triggers pause/stopping of playback: a notification, an incoming call, interacting with Siri.
I can manually pause playback through in app pause button or via AirPods touch sensor/earbuds button and resume playback.