Halo 5 rank locked

Hey my rank is stuck at onyx 1848 even after winning 16+ games in a row. Win or lose it won’t change and I’ve hard reset and force quit the build multiple times. Has anyone else had this problem or know how to solve it?

I think you need to go a little higher in order to move up to Champion rank

Yeah ok I was champion but I didn’t play for a day and lost it but now it won’t rank up or down at all