I was doing a couple team missions with a crat, calming mobs and lockpicking chests. Eventually I stumbled upon some nodrop items, such as the aao and aad Ring of Lucks. When I went back to the mission to retrieve them on an alternate character, however, I could not find the chest. Or..Any chest for that matter. They all seemed to dissapear.. Is this normal? I was under the presumption that items in chests would cause the chest to never rot. Is there a timer on the things?