Why won't this cheat code work?

[soopytwist]

I've been using a pop-up menu cheat system while making my game for play-testing and debugging. I'd like to leave the code in but password lock it; so I did this in a new project:


Very simply it checks for the right word typed after pressing the Home key. Enter anything other than the right word and press Return and nothing will happen and you can repeat this.
When the correct word is typed in (redacted here in my image) the Edit Box object is destroyed to avoid any complications and it doesn't matter if it's destroyed because the pop-up menu only appears when double-clicking the mouse on the screen so no cheats are active.

This works in a new empty project with nothing in it other than the Edit Box object and a counter.

Add this code to my game however and it doesn't work. Type the correct word and the counter doesn't change.

Why?!

[soopytwist]

Oh, I just found out why... and it is one of the weirdest software bugs I've ever encountered.

Set the Edit Box to a height above 35 and the code doesn't work. Anything below 36 and it does work. How utterly, utterly bizarre.