Achievements not unlocking or Tracking

Just started playing this yesterday and I'm having the same issues - did all challenges of a whole month (which unlocked the perfect achievement) but Marathon and Gimme 5 didn't unlock and are not tracking as well.

None of the Achievements tracked by me... What is this ****?

Today I unlocked "Greed Over Need" for Diablo 3 (Xbox One), achievement appeared to unlock fine and shows as unlocked in the Xbox Live website, but my GS didn't increase. After laboriously adding up all of my games manually, I am short of the corresponding
25G. At the suggestion of Xbox Support I have cleared my cache and alternate MAC address, which didn't help. Any one else having issues at the moment?

I know it is an older post, but I finally figured out the problem I was having with achievements and tracking. Here is the solution that worked for me (in case anybody else needs the information).

In a nutshell, it was my ad blocker. I run pihole (https://pi-hole.net/)
on a raspberry pi as a network appliance to block advertising. By default, it has a pretty aggressive blacklist, and I needed to add a few domains to the whitelist. (I had done this in the past, but things must have changed on the Xbox One recently.)

What led me to finally look at this was a message I received on the Xbox One when signing in the other day. I don’t remember the exact wording, but was similar to “Local cache is almost full. This
can affect achievements stats and leaderboards”. When I held the guide button down, it took me to the Network part of the settings application. Then a quick search on Google brought me here:

https://www.reddit.com/r/xboxone/comments/94qb7t/local_cache_is_full/

One post mentioned pihole, and another provided this link:

https://discourse.pi-hole.net/t/commonly-whitelisted-domains/212

When I compared my whitelisted domains with the ones recommended in the “Xbox Live” section, I was missing a few. Once those were updated, everything on the console started to work as expected.

Hopefully this is able to help somebody else who may run into the same problem.

And for the record, I am not getting rid of pihole ... that is a great piece of software, and worth the effort to keep it up to date.

Sign out of everything. Hard restart your consoles and internet connection. And turn off your computer after you sign out of everything. Wait 5 mins. Bring your main console on first and sign in and see if they unlock or update to correct the tracking

Heya vivapinsam!

Sorry to hear about the achievement trouble you're having. Please make sure to check out our

Achievement Troubleshooter and run through all the steps. If none of the steps help, please make sure to fill out the survey included near the end of the troubleshooter.

Thanks for your patience!