Unfortunately boosters are connected to your devices memory. Which means if that data is lost, so are your boosters. However, I will point out that if you get a new iPhone and transfer data from an old phone to your new iPhone, your boosters actually stay in tact. I've done this before :)
Hi there, I've seen in other threads that this feature is still newer and experiences some issues. You may be having one of those right now! Sorry for the inconvenience.
Boosters are connected with the memory of the device you are playing on. Unfortunately if that data is lost, so are your boosters. Good luck in restoring them by going through the appropriate channels!
Hi there, I do believe modifying the profile picture is linked to your account. If it's asking you to continue to Facebook, are you able to open the app on Facebook instead and see if you can modify it there?