I logged in a couple nights ago to find that I had lost all progress on the Qyzen Fess quest, Stalking the Score.
I had talked to Qyzen and accepted the quest. I had accumulated 15 or 16 trophies from the beasts of Hoth over the previous week or so, but had not turned any in, so they were just sitting in inventory. However, now they are gone, and the quest is acting like I have never talked to Qyzen. I have gained no influence with Qyzen.
As people have pointed out, the farming of these items is a bit time consuming, especially for a more casual player. It feels really bad to lose what amounts to me as a weeks progress doing something I'm not a huge fan of.
I've also filed a bug report through the in-game interface.