I've also lost keys 2 weeks in a row. I know reset removes them but I raided a couple of hours [i]after[/i] reset both weeks and wasn't logged in before reset. I didn't switch characters at all during these sessions. The last time they were deleted we called it a night after the 3rd encounter, they were in my inventory then. Left to do some public events/patrols etc and then they were gone. I was the only one this happened to of our raid team. I was party leader fwiw.