I have the game on both on android and steam and gave someone my friend code. I was playing on my phone and saved my progress. When i went to play on on my PC I had a couple cyan chests from the friend bonus. I downloaded my save from my phone and then lost the friend bonus stuff. I don't know how often you receive the friend bonus stuff but I have not received any since. That wasn't the only time that happened and would be nice if we could somehow get the chests back.