So was helping out a mate in temple of primordial, finished it no problem, but as the final chest was in the zone out area, we ported out before I had a chance to loot. Obviously the quest didn't complete, but I wasn't too worried.
However when I completed a foundry mission an hour later, opening the chest gave the reward and triggered the completion of the temple quest and then I was able to open it again to finish the foundry quest.
Slightly odd and could lead to other issues if your not that tight on your chest objects
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