Xbox not Registering my achievements

My only problem is that the 360 achievements never register. It takes me a couple of days for the xbox one achievements to come through

May just take time to register some of my achievements take time to register.

Hello

Thanks everyone for your replies.

I waited 72 hours and restarted my Xbox but the achievements still haven't registered in the quests, either on my Xbox or in my Game Pass app.

The March quest achievements registered immediately and so did the rewards points except for the quest master points, which took a day or so.

Is there anything else I can try? I've held off playing any games because later achievements are harder to get.

Thanks.

EDIT: I just picked up another achievement in Operancia and that also failed to register so three have now failed.

thank you, I had to clear the cache, redid the achievment, and I know have it, thank you very much

Hello WoolenCoyote40! I had a similar problem with a few achievements in Halo3. To fix this problem, please try and obtain the achievement again. It should appear. If it doesn't appear. Try to clear your cache, and obtain the achievement again. Hope this
helps!