We would like to welcome you to the king community. Thank you so much for being willing to joining.
That's true, you will lose stored boosters and lives when crashing the device or App. You can sync boosters to servers on the web version or on Windows 10 app platforms. The platform you need to sync boosters with server is not available on Android or iPhone. So the king could not do it.
However, it is possible to sync gold bars & levels so you can get them back.If you haven't got it, check if your game is connected to the server or not.
If you have any questions at all, I’d love to hear from you.Simply reply back to this post, or send me a message.
Have a good day.