Some times after a match one of the suit modules will just level up. From whatever position I'm at. It could be stealth, at like 20% of 100% for next level and it just goes whooooop and fills up to 100% and then that module levels up. I'm currious as to what causes this to happen. I'll pay closer attention the next time it happens but I don't think I earned that much stealth xp in the round, more likely that I unlocked something that caused it to level up.

I think that happens when you level up the suit module in game then it kind of like counts all the exp you earned to get to the next level at the after-game screen.