I want to add a cloud backup / restore function to my app, so I checked the Google Play Saved Games function to see if it can work. The code I used was the example of Google Play Saved Game - Collect All The Stars 2, you can find it here: https://github.com/playgameservices/android-basic-samples/tree/master/CollectAllTheStars2
I have been working on it for several weeks, I can save(backup) and load snapshot on 1 device. But I meet issues below recently:
Before I do the testing, I have done the configurations like:
It should be noticed that I only make the CollectAllTheStars2 as alpha test or internal test in Google Play Console, but not really published. But I think this should not be the real cause of this problem. I searched on google and found that many users claimed that some other games can not sync the game progress on different devices or other issue, I doubt that the "Saved Games" function of Google Play is really robust enough? Else I many need to implement our own backup/restore game data...