Lich stealing Endo caches from sabotage

[(XBOX)NCC Equinox]

So I have been doing lich missions and I've noticed in the sabotage missions they will steal the caches, I wouldn't have a problem with this if it was returned after you dealt with the lich once and for all. But I've had 2 instances where they don't return the caches. One stole a 1000 Endo total and another lich stole 400 Endo. I didn't see the Endo in the recovered rewards so I guess it's bugged. In the case of the 400 Endo I only got 6 Endo recovered. This needs to be remedied because liches not returning all rewards is a problem.