Are hostile mobs spawning in temples and blowing up chest by stepping on that TNT plate? Has happened to me. I guess I'll have to search map faster rush the temples and get the stuff out quicker. Any other ideas? Playing on hard survival.
In one temple 'desert' I saw it happen. I broke a block beside the blue one and looked down to the chest. there was an enderman and a creeper down there and somebody stepped on the plate to trigger the explosion. I have started digging steps down from outside the temple and when I open the wall behind the chest I light up the area.
I've never seen one blown up myself, so I assume you had bad luck.
Stay fluffy~