[jp.naver.line.android] LINE does not receive push notifications

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Affected app Name: LINE Package id: jp.naver.line.android

Describe the bug Push notifications are not received. App appears to be registered in MicroG control panel, but never receives messages. LINE reminds user about turning off battery optimizations, but it does not actually run in the background. This is not observed when using a system with Gapps.

To Reproduce Steps to reproduce the behavior:

1. Set up MicroG as usual, with registration and cloud messaging
2. Install Line and log in.
3. Have someone send a message.

Expected behavior It should receive push notifications

System Android Version: 12 Custom ROM: Unofficial Lineage OS 19

microG microG Core version: 0.2.27.223616 microG Self-Check results: All ticked

Additional context All other apps using push notifications work as expected. This appears to be a known issue, as I've seen a few threads in Chinese language forums reporting the same. LINE is widely used in several East Asian countries, such as Japan, Taiwan, and Indonesia. Not having push notifications severely hinders the usability of MicroG based systems for users who are expected to respond to messages promptly in these countries.

[robnraz]

Same issue

[maxresd3fault]

Same issue