I just lost 5,000 gamerscore just out of no where, what happened? Can someone help me fix this?

It's a glitch that will fix itself.

Happened to me, too. Don't know how you would modify your Gamerscore, but I want it back. I've been working on my Gamerscore since Halo 3 came out, and there's no one who can fix it? Microsoft just lost a customer.

If it's xbox one games then it's a glitch that has been happening for a couple of years.Had it happen to myself where i just lost over 200k gamerscore.

No one knows why it happens but it should just correct itself within a few days.

Everyone i've encountered with this glitch has got their gamerscore back to normal,including me,but like i said,it could take a few days.

No one has called anyone a "cheater".

When someone's Gamerscore drops a Gamerscore reset is the first thing to look at because 9 times out of 10 that is the reason.

But occasionally there is a glitch & someone's Gamerscore bugs out but corrects itself later.

It's happened to me a couple of times.One time I lost over 200k but it corrected itself.

This also happened to me, which I have reported to support also. They told me they were going to work on figuring out what happen. They can't exactly fix the achievements on their end. I believe it had something to do with syncing the achievements. The day
I noticed it I hadn't even gotten on the Xbox one at all. The gamerscore lost is all from the Xbox one, and only the gamerscore achieved before it occured or "Glitched" I'll just call that.

It's just weird that as I unlock achievements for the Xbox one it counts them towards the "Xbox One games" category in the Xbox 360 achievement list, but doesn't even recall the previous games. If anyone else has this issue please post here or contact support
and give them as much detail into this as you can. This could be a growing issue and hopefully we can get it fixed.