GetServerInfo success if APK installed directly, but don't works if downloaded from Play Store

I have an app based on Combu 2 (first version of the app three years ago) published on the App Store and Play Store.

When running:

CombuManager.instance.GetServerInfo ((bool success, CombuServerInfo info) => {...}

It works normally both when downloading from the App Store (iOS) and when the APK is installed directly on the device (without downloading from the Play Store). But when it is downloaded from the Play Store, "success" is false. Is there any report of something similar? Is it possible that for security or another reason Google is blocking the app's access to the network? Any idea how to deal with this matter?

I understand that maybe it's an issue I have to verify with Play Store, but maybe someone here can give me some guidelines.

Thanks in advance.