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Error when communicating with Google API(20): Timing out service connection

See original GitHub issue

Describe the bug

Opening the CWA for the first time today resulted in display of error message Fehler bei Kommunikation mit Google API(20), Error when communicating with Google API(20). Every opening of the app shows this error until Google API(39508) error kicks in (too many calls to API).

Today would have been the first time to have 14/14 active days. Now it stays at 13/14 days.

Sorry I cannot provide more details right now. Unfortunately I had USB debugging off and after switching it on, only the Google API(39508) error was captured in the log. Also, it is a massive hindrance to documentation not being able to take screenshots. I didn’t have another smartphone or a computer nearby when the error happened. Users of CWA on iOS apparently can take screenshots without hindrance. Friends on iPhones share screenshots of CWA with me all the time. Frustrating.

Expected behaviour

The app opens without any errors.

Steps to reproduce the issue

Install the app on 16 June 2020 via Google Play Store, keep it updated, version is 1.0.4 before any error in CWA appears
Use app with bluetooth and location on for some time every day; see days active incremented every day
On 25 June 2020 see the Google API(10) error appearing for the first time; error does not appear again that days and days active are incremented when opening the app again
See Google API(10) error appearing and disappearing on other days after that (I don’t have an exact log which days); days active are still incremented every day
On 30 June 2020 see Google API(20) error appearing when opening CWA for the first time. Appears again every time the app is opened / put into foreground until no more calls to Google API possible (Google API(39508) error).

Technical details

Device

App Version: 1.0.4
Android Version: 6.0.1 (stock Android of device, not rooted)
Device Model and Manufacturer: Samsung S5 (SM-G900F)
Latest OS Update: can’t determine date, Android menu says all available updates installed
- Kernel: 3.4.0-14131106 from 06 Aug 2018
- Build number: MMB29M.G900FXXU1CRH1
Latest Update of CWA: update to 1.0.4
Installation Date of CWA: 16 June 2020
Date/Time of the error: 30 June 2020 about 9:00 local time Germany
Google Play Services version: 20.21.17 (040308-316502805)
Google Mobile Services (GMS) version:
- com.google.android.gms [202117018] [20.21.17 (040308-316502805)] [Container]
- com.google.android.gms.nearby_en [v202304013]

Additional context

This error happened for me after several days of seeing Fehler bei Kommunikation mit Google API(10) (Error when communicating with Google API(10)) when starting the app, as described in #771. Today, only the Google API(20) error appeared. The Google API(10) error so far seemed to “resolve itself” on my device, not reaching Google API(39508) error (too many calls to API); days active was incremented in those cases after the error was not displayed anymore. Google API(20) in contrast reappeared until no more calls to the API were possible. Days active was not incremented today.