I don't have video proof but - Sometimes 1 of the gear slots gets stuck and can't be changed while in Power Match
Sometimes a gear slot gets locked, and despite it showing that it changed in the brawler UI, in the draft UI and in match, it doesn't actually change.
You can kinda conbat this by spamming a lot of different gears and eventually it starts working properly, but not always.
This mostly happens in friendly mode power match, not as much in Ranked (at least in my experience), but has cost me matches in scrims.