STATS wont update rank will reset to 31

my conversation with xbox support PLEASE HELP

my stats will not update on halo mcc i.e rank gets reset , kills dont up date
You 4:08 PM
4:14 PM Ambassador joined the chat.
Have you tried going to halowaypoint to see if stats update?
Ambassador 4:14 PM
no
You 4:14 PM
Go to halowaypoint and see if the stats are updated
Ambassador 4:15 PM
the rank will go up … but if i leave the game and come back it will be reset to 31
You 4:15 PM
Have you tried deleting the game and re-installing it?
Ambassador 4:16 PM
yes
You 4:17 PM
ive even got a different xbox one installed then deteled my tag put a different one on there and re bought the game and it still does it

I have this exact same problem I have gotten from 49 to 50 3 times now. Turn off Xbox go to bed and next day I’m 49 again… On waypoint game history the last game it says I played was over a week ago. Why couldn’t this have happened after I got my 50 haha. But seriously can someone please help me with this issue?

i really wish i could fix this
anyone?