Why after recompilation the mobile application does not connect to the Google account?

Question

Android

I took a random application from the play store, and simply recompiled it without any changes, signed it, launched it, it works, I can play against other players online, but the problem is that I can’t connect to my Google account, that is, the application is not blocked, but it doesn’t connect to the account, it’s just that after trying to connect, it’s loading and the application just remains without a connected account, the original application itself connects. What is the reason?