From my extensive knowledge of how AB works. In the past I've landed on 2 different instances that shared the same IP. I could loot from 1 but not the other because I had looted from it 2 hours previously, but on the 3rd time around when I landed on a completely different IP I couldn't loot it. Depending on how many times it was already done, there could quite possibly a hard cap on chests per day no matter big or small (I never ran it enough to find out). Even though you can sometimes loot the big chests more than once a day. After a certain number of chests have been gathered, it could quite possibly cap the rest of them out. These were my first thoughts, too.But the same IP is unlikely in my opinion. First, the event train stays often on the same map for multiple metas so if that could trigger the bug, this bug should be well known. Second, on one day I did the meta the first time on the same map as a friend of mine, two hours later we did it again both on the same map. She could loot, I couldn't.The daily cap is in my opinion also not an option, because you can get the bug one time and in the next meta on the same day you can loot again. If daily cap was the case you couldn't loot at any meta after you get the bug for the rest of the (server) day, which isn't the case.