Weird glitch with trigger 1

Last night I turned on my MD and the first trigger wouldn’t trigger a sound. I loaded multiple different kits, checked all the I/O settings, and nothing would come out. If I went into REC mode and placed a trigger, it would light up, but when I hit play, no sound would come out.

I ended up fixing it by doing a factory reset, but I’d obviously like to know if anyone else has had an issue like this.