I had 2 hoglins in my game and we decided to bring them into the overworld and put them in a fenced area. We named them, and put warped fungus around to scare them. This kept them running in big circles forever. Once we took away the fungus, They always were either going almost inside of each other, or running in the direction of any player. While running into the direction of any player, or bumping into each other constantly, it caused a big problem. Them being near or inside of each other crashed the game. This made it so every time I attempted to join the server, it crashed. I fixed it by having my friend kill them by shooting arrows down onto the spot where the hogs were barely visible, until one died. The crash error was: java.lang.StackOverflowError. 
This crash I researched and found associated with blocks being stuck in each other. A simular issue i found recorded, MC-109348 , stated this exact problem, but in an older version of the game. I hope you can test and find this bug, and fix it immedietly for future snapshots and the final version of this update.