Achievements not working?

I have played through most of the campaign on Heroic (just getting the story before legendary) and have played several multiplayer matches, but I have not unlocked any achievements, despite fulfilling the criteria. Am I the only one this is happening too? And if so, how do I fix it?

It has happened to me too. I’ve beaten the campaign on Legendary and didn’t get ANY achievements for completing the game. I got the Chapter ones but not for full game completion

I haven’t even received any of the chapter ones, or any kind of achievement.

I finished the game last night on co-op heroic, and all level achievements have unlocked except level 15. For some reason, even though the game recognises that I have completed level 15 on heroic in co-op mode, the final level achievement, and subsequent game finishing achievement did not pop (it says I have completed 93%). The only thing I can think of, and this would be strange, is that a 4th player joined us half way through level 15, and it was this player who did the level 15 finishing move. This new player had also previously finished the game on normal and had unlocked the level 15 achievement.
I haven’t had a chance to do the level over to see if it will eventually pop, but willl let you if it does when we do.
Cheers

I played solo, so that would not apply to me, but I appreciate your response, and it has been four days now without any of them unlocking.