also having this problem. typed in window.localStorage.removeItem('bunbons') in the console and nothing happened. the eggs just disappeared on their own with no provocation.
I figured out the issue - it happens moving eggs in and out of the inventory. Uploading a fixed version now! You can reset your game state by using the console command resetState() or; in the game itself, typing a tilde ("~") to open debug mode, "r" to reset, and "~" to close the debug mode again.