I've had this too. I think I died during an auto-save moment on the mission Tuchanka: Bomb and from that point on all my gels, fuel and credits were 0. Only realized it an hour later or so. But I could fix it with re-loading. Hasn't occured since.
On difficulty levels higher than normal, if you use the resume option instead of reloading, the game takes a bunch of your credits and resources. It might happen even on normal, I just didn't notice it until I was playing on insanity.
Interesting, ill try this and see if It happens, thanks for the help
