Campaign. Plenty of bugs.

So for some reason my achievements seem to think I completed my solo run in Co-op on the website, while my Xbox One shows that all Halo 1/2/3 have only got Legendary Skulls on solo which I did, oddly Halo 2 doesn’t register the mission completions while Halo 4 is partly the same so far.
Even noticed the scoring/speed-run stats are missing on most of the missions. Also noticed some achievements seem to be stuck in some ‘unlocking’ phase where it doesn’t seem to do anything, noticed even easter-eggs are bugged too like in Halo 3 where I had to find the apes family on the first mission since pretty sure achievement was supposed to unlock for that.
I also noticed a weird issue in Halo 1 where if I get killed it seems to show a Flood form right in front of where I re-spawn on my checkpoint then it vanishes.
I’m sure there’s plenty more bugs but this is off top of my head from earlier when was trying to play my Legendary marathon run by myself.

It’s buggy all over!

I know right, I know past Halo games have had their bugs on the 360 but I didn’t expect it to be this buggy on the X1.

Got hit with the Untracked Build Can’t Upload screen after killing the two hunters in the hangar on Infinity in Halo 4. Other three halos have been fine. Achievements have been a bit delayed but awarded eventually. Halo 4 is buggy though.

Untracked build?, haven’t tried anything like video’s on there yet. I’m not sure about delayed achievements but I have been awarded for the wrong ones sometimes, even then scores aren’t registering correctly.