Missing map challenges

I lost a bunch of map challenges for my lvl 50 Athena character last night while in a multiplayer game that a friend was hosting. I always complete all map challenges in NVHM.

The only problem I’ve had is in the Lunar Launching Station with the Tread Carefully or Finish Him challenge. Sometimes those challenges just don’t stick for my characters. However, I had all challenges completed for this lvl 50 Athena character and now a good portion of the map challenges are gone!

I do chase challenges for all charactes and like to see most of them completed by the time I’m wrapping up TVHM. Is there an easy fix for this problem or is this a glitch that just won’t go away?