The quit penalty system is useless. I had a guy on my team who left. I was looking at his profile and it said Borderlands 2.
I was messaging him, if he knows that he ruins the fun for other people and I asked if he does even care. He just said something like “calm down”
People leave a ranked match and just go hop on another game like Fortnite, FIFA or in this example Borderlands 2. They don’t even care if they get banned, neither do they care about the other players.
Most of the time when someone quits, I look on their profile and they jump on another game.
But about the OP. It happened to me twice that I got kicked out of a game without a disconnect and getting a 30 min ban without a reason. I dunno why it happens sometimes.