Achievements not being awarded

I Was playing the the Realm I had purchased with a friend when I stopped earning Achievements a few days ago. My last Achievement was "Diamonds to you!" on 4/17/18. I know I have completed at lease two additional achievements since then, one being "The Haggler" Which is Acquire or Spend 30 Emeralds by trading with villagers, I have a total of 37 in my Realm but still have not gained the achievement. My friend also has not be awarded their achievements that they know they have earned.