Hello there my friend! I found the bug on that puzzle, and it appears to be exclusive to it. When you open the chest and leave that screen, the game will check if it is opened and remove all blocks from that map. I will upload a fixed version as soon as I can! Thank you :)
Hello my friend! Due to some work stuff I was not able to fix this bug/exploit in the game yet. Reponding to your other comment, the bug is only present in the mentioned puzzle.
