A game controller I worked on was accidentally sensitive to physical strain.
We discovered this after the first prototypes/consoles were sent to early reviewers. They kept seeing weird in-game behavior no one could replicate, even when affected reviewers tried to demonstrate. Turns out they were gripping hard enough to minutely bend the PCB during intense moments in games, which created voltage spikes the software mistook for button presses. You needed to be angry to replicate.
We discovered this after the first prototypes/consoles were sent to early reviewers. They kept seeing weird in-game behavior no one could replicate, even when affected reviewers tried to demonstrate. Turns out they were gripping hard enough to minutely bend the PCB during intense moments in games, which created voltage spikes the software mistook for button presses. You needed to be angry to replicate.