This is literally the type of thing that caused the THERAC-25 disaster (https://en.wikipedia.org/wiki/Therac-25). Experienced users hitting keys faster than the app could process them, resulting in safety features being inadvertantly bypassed.

That's a great example of bugs in overcomplexity. The requirements were relatively simple, but they went for a full-on multitasking OS with all the complexity that entails.