I don't know if this has been addressed, but I confirmed with my clan that it is happening with them too. Say you do PoE challenge and get 6 of the little white triangle things that you turn in to Cryptarc (sorry for spelling) for 200 Glimmer. I've noticed at the Reef that when I have 6 or so it only allows me to claim a few of those and then switches to decrypting engrams. I looked in my inventory and they just disappear. I've heard it could be showing more than we actually have, or there is a bug. When I hit max Glimmer they also just disappear. Again, this may have been addressed but wanted to see what the community knows or has seen on this topic.