Google Game Services work for debug but not for shipping

Hello,

I have an Android mobile project close to release stage. I have just released the Game Services for the game. Everything is connected and configured according to tutorials. The problem I am facing is - while I ship alpha/beta apks via Google Play dev console and install them on Android devices, the Game Services UI does not log me in (I tested on several phones with several accounts). The behavior is the same as in the video frtom this thread:

However, I can’t debug the problem - when I deploy the game via Launch button in Unreal and run that version on the device, it logs in to Play Services no problem, correctly showing achievements and leaderboards.

What could be the issue?

Update: found an error in the Logca

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Solved.

Turns out, there was a wrong SHA1 encryption key in the Google Developer Console, so it was rejecting the requests from shipping game version.