Why was i banned before starting a match ?

Hello 343 . Not to be rude but these last few days have been bad server but anyways I was banned before playing or starting a match . It says " left fire team when I’m not even with ppl . But I was banned for that . You can go check I shouldn’t be banned haven’t even played a game since last night with no quitting . What’s the issue cause I’ve checkedbmy internet connection an restart as well just so you don’t use that as a excuse please an thank you

All ban-related questions and discussions should be directed to the pinned official ban thread in the support forum:
https://www.halowaypoint.com/en-us/forums/e0d9938206f04a598ce84f2c8cadce02/topics/the-official-halo-5-why-was-i-banned-thread/19fa6556-e0b1-4248-b817-b3a99d0af5bf/posts