Hello - could you let me know what platform you are playing on? I know that one user faced this issue on iOS and found that killing the app and relaunching it resolved the issue.
Hello, I played this game on Google Chrome, it seemed to resolve by refreshing the page, but I figured out how it happened. It happens when i double click the item, for me, i got smaller, so i clicked back, and the item on the desk disappeared. I dont know if that helped, but good luck! Also, awesome game, I had to do a guide that i think that you posted, but i got all the codes, the windows one was hard because i thought that it would appear when i skipped many times, but when i LOOKED at the title of the code, i realised. Also, could you a little cat easter egg? it would bump my rating from 5/5 to a 10/5!