Background: For the Christmas lock boxes, I played on mobile phone with a slow or bad internet connection.
Suggestion: Once you try a wrong combination, you should not be able to reenter that same lock combination consecutively, or at least it should not reduce an attempt.
Reason: I used up two or more of my attempts just because my internet connection was slow. I may have clicked on it twice to get a response, but as a result, I used up my chances inadvertently.