On my world I have a tnt duper set up and a set of fence gates to delay it and make it not explode untill right when it falls next to a strip of log blocks (Worked the timings out in a seperate world and it works fine). Right when the tnt reaches the point it should explode at it dissapears doing no damage to its surroundings then about 5 seconds later I see an explosion happen in the water below. This explosion is not a visual glitch, I know this because it deals damage and breaks blocks(When there is no water of course). What I thought was the problem was the fact that my server is running around 200 ticks behind so, as I installed the files on to my computer to transfer it to a new server host, I tried putting a copy in my saves folder and trying it out. The same issue occured and I dont know anything else that could be causing it.