First of all, I looked up all related tickets and there are similar ones, but none of their solutions worked. My world crashes every five seconds and I really want to play in it. A bunch of testing revealed the cause: Mob Spawners crash the game when they are just in your world. I tested this on many different worlds and that's how I cam to that conclusion. It just started happening this update. I searched for all tickets involving crashes and mob spawners, but none fit my description perfectly or had solutions that worked. Please help me, I really liked that world and spent three years working on it. The bug is that just having a mob spawner in your world crashes the game, even if you're not near it or it isn't spawning mobs. This happens on creative mode and survival. It happens on all difficulty levels including peaceful.