How buggy is the Pet Rescue Saga Coins feature?

the Pet Rescue Saga Coins feature

use-coins-pet-rescue-booster-slitz

Click the picture to get 100 coins shared by Mainewil’s personal account.

The feature for adding coins when passing a level seem to be extremely blurry atm, how does your coins add to your treasure?

2 stars give 100 coins, is that correct?

Here are some notes about the bugs: https://care.king.com/en/pet-rescue-saga/pet-rescue-not-giving-me-my-coins#entry_52995


Say something about this!