So I go from D6 almost onyx. okay, to d5, I logged off infinite after my win. I WAS STILL D6. I played no matches, I haven’t left matches and my PC was off. SO I had to work my way back up to d6 today.
How do I lose rank when I AM NOT EVEN PLAYING THE GAME? Is this a bug? Cause im pretty ticked off about it. Anyone else experience this tomfoolery?
It seems like some type of lag or delayed calculation by the server. Sometimes I have seen either an increase or a decrease after I log off and then prepare to play the first match the next day.
343 strikes again. All in all this system needs an overhaul, and they need to get rid of social SBMM counting towards your ranked SBMM. (not your rank). I have a 2.1KD in social, but I go to ranked I hover between 1.1-1.2. (lowest of any halo game I played… like going from 2.4KD in ranked on MCC… to… that. SO it’s putting me up against Lil roybergs and lunchbox’s while the randoms are poop either from LFG, or just soloqing.
On a serious not though, I didn’t derank the whole day, was barely going up, or earned no csr. Log onto this bs 
Around when the game came out, I hadn’t played for a little less than a week after I made my placement. Once I logged back in, I dropped a rank. I didn’t even play any matches after I had placed so I originally thought you get de-ranked for not being active. Hasn’t happened since though.
At least I am not alone in this issue. This is probably the most busted ranked and multiplayer has been in Halo since the release of MCC how bad it was during its first 3 years.