Using the seed: 4244147687037794345

Opening the chest at 178,  61,  -325 in the shipwreck, causes the game to hang (extremely long tick processing)  for a long period of time (close to a minute).  All entity processing hangs (turtle movement, water movement) but block breaking does not. 

Once the chest finally opens, subsequent attempts to open the chest do NOT have the hang.

Perhaps there is some weird corner case when determining the loot table for that chest.