I’ve been playing Team Arena all night and we’ve lost 3 games out of the 20+ so far. Guy I’m playing with was a lower rank than me, has been increasing consistently (Over onyx 1700 now). I started at 1621 and was stuck at Onyx 1641 until we lost the first game (after 12 played) and deranked… but I wont rank up with all the wins. I finally ranked up to 1652 randomly… Lost the third and dropped to 1646. The kids we are playing are all diamond/onyx mix…
What is wrong with the servers? Is anyone else having any issues? Is there some bug? 
To update: I can definitely derank… So WTF lol. Why would I remain stationary while my teammate keeps going up? Does it take into account my FFA rank being so high or something?
I’ve had the same issue before at around Onyx 1900 and Champion 35 in SWAT. I always thought it had to do with who you play against (your rank verse theirs) but that doesn’t seem to be the case. Personal performance must be taken into account, though I won 4 SWAT games in a row at that 1900 rank, was #1 each time, and didn’t gain any CSR so go figure.