Incoming calls do not trigger any notification [rare occurrence], but are noted in call histories

• /e/ version: 0.11-n-2020082970471-dev-h850
• Device model: LG-H850
• When it started to occur: in the last 1-2 months
• Reproducible with the last /e/ version:
• Reproducible with LineageOS:

Summary

Sometimes incoming calls do not trigger any notification [rare occurrence], but are noted in call histories.

• The device is unusable
• The bug is the source of a information loss or a waste of time
• The bug concerns a third-party application
• The bug concerns security
• The bug concerns privacy

The problem

Steps to reproduce

Not known. Cannot be reproduced by the user.

What is the current behavior?

Third party is calling in. No call notification is displayed. But later, the call can be identified in the call history.

What is the expected correct behavior?

Third party is calling in. Call notification is displayed

Technical informations

Relevant logs (adb logcat)

09-02 09:51:58.573  3321 19125 I chatty  : uid=1000(system) Binder:3321_17 expire 4 lines
09-02 09:52:00.552  3321  3368 I chatty  : uid=1000(system) Binder:3321_1 expire 2 lines
09-02 09:52:00.563  3321 32480 I chatty  : uid=1000(system) Binder:3321_1E expire 3 lines
09-02 09:52:00.567  3321  4606 I chatty  : uid=1000(system) Binder:3321_A expire 4 lines
09-02 09:52:00.570  3321 23674 I chatty  : uid=1000(system) Binder:3321_10 expire 2 lines
09-02 09:52:02.369  3321 32481 I chatty  : uid=1000(system) Binder:3321_1F expire 3 lines
09-02 09:52:02.568  3321 14272 I chatty  : uid=1000(system) Binder:3321_16 expire 3 lines
09-02 09:52:03.279  3321  4058 I chatty  : uid=1000(system) Binder:3321_7 expire 2 lines
09-02 09:52:05.079  3321  3683 I chatty  : uid=1000(system) Binder:3321_3 expire 3 lines
09-02 09:52:05.694  3321 17648 I chatty  : uid=1000(system) Binder:3321_18 expire 1 line
09-02 09:52:07.412  3321  4630 I chatty  : uid=1000(system) Binder:3321_C expire 2 lines
09-02 09:52:23.771  3321 32476 I chatty  : uid=1000(system) Binder:3321_1A expire 2 lines
09-02 09:52:23.935  3321 32477 I chatty  : uid=1000(system) Binder:3321_1B expire 1 line
09-02 09:52:30.422  3321  3381 I chatty  : uid=1000(system) android.ui expire 2 lines
09-02 09:52:31.017  3321  3592 I chatty  : uid=1000(system) ConnectivitySer expire 173 lines
09-02 09:52:31.266  3321  3402 I chatty  : uid=1000(system) PowerManagerSer expire 14 lines
09-02 09:52:31.761  3321  4198 I chatty  : uid=1000(system) Binder:3321_8 expire 1 line
09-02 09:52:35.917  3321  3399 I chatty  : uid=1000(system) android.display expire 1 line
09-02 09:52:53.025  3321  3380 I chatty  : uid=1000(system) ActivityManager expire 1 line
09-02 09:52:53.988  3321  3378 I chatty  : uid=1000(system) android.bg expire 1 line
09-02 09:52:54.269  3321  4058 I chatty  : uid=1000(system) Binder:3321_7 expire 5 lines
09-02 09:53:01.243  3321  3592 I chatty  : uid=1000(system) ConnectivitySer expire 130 lines
09-02 09:53:03.389  3321  3384 I chatty  : uid=1000(system) batterystats-sy expire 4 lines
09-02 09:53:03.492  3321  3380 I chatty  : uid=1000(system) ActivityManager expire 9 lines
09-02 09:53:10.298  3321  3683 I chatty  : uid=1000(system) Binder:3321_3 expire 6 lines
09-02 09:53:10.329  3321  3321 I chatty  : uid=1000 system_server expire 24 lines
09-02 09:53:10.360  3321  4667 I chatty  : uid=1000(system) Binder:3321_D expire 1 line
09-02 09:53:10.385  3321 32479 I chatty  : uid=1000(system) Binder:3321_1D expire 9 lines
09-02 09:53:10.387  3321 19690 I chatty  : uid=1000 system_server expire 1 line
09-02 09:53:10.440  3321  3938 I chatty  : uid=1000(system) uteStateMachine expire 3 lines
09-02 09:53:10.442  3321  3941 I chatty  : uid=1000(system) CallAudioModeSt expire 5 lines
09-02 09:53:10.723  3321 28985 I chatty  : uid=1000(system) Binder:3321_13 expire 1 line
09-02 09:53:10.768  3321 14272 I chatty  : uid=1000(system) Binder:3321_16 expire 1 line
09-02 09:53:28.399  3321  3592 I chatty  : uid=1000(system) ConnectivitySer expire 138 lines
09-02 09:53:50.904  3321 20454 I chatty  : uid=1000(system) Binder:3321_E expire 1 line
09-02 09:53:50.945  3321  4606 I chatty  : uid=1000(system) Binder:3321_A expire 1 line
09-02 09:53:51.623  3321 32479 I chatty  : uid=1000(system) Binder:3321_1D expire 1 line
09-02 09:53:51.624  3321  3380 I chatty  : uid=1000(system) ActivityManager expire 9 lines
09-02 09:54:11.022  3321  4619 I chatty  : uid=1000(system) Binder:3321_B expire 24 lines

Relevant screenshots

Call missed at 9:53. Uncovered 'by accident', because that call was awaited.

Solutions

Workaround

Possible fixes