Thanks for playing! I'm glad you like the game so far, and am so sorry you ran into a bug. (I'm a single person dev who is still pretty new to coding, so it's unfortunately a fact of life for my games right now, oops.)
Would you mind providing a screenshot of this happening? Or screenshots of before this happened?
What options did you pick, and in what order? How many times did you look at the safe? What did you do before or after this bug?
Anymore details you have, or screenshots, on what you did exactly when running into this problem would be great, as some bugs can happen under very specific circumstances.
You can reply here, or e-mail me at colinxzain@hotmail.com with more information/screenshots.
Thank you!