iphone – App deletes all progress after closing

I recently downloaded the game “Lost City” from Apple Arcade and after closing the app it deleted all my progress. At first I thought it was a one time thing but it happened the next time too (and for the other four times I tried it). I really don’t know how can I fix it because it basically makes the game unplayable.
I tried a few things:

  • Reinstalling the app
  • Restoring data from iCloud (it says I have no data saved from this app)
  • Deleting the app, then restarting the phone and installing the app again

Also, Game Center saved my achievements and high score, IDK if it’s relevant but it’s something. I’m out of ideas, any help?