I updated a world from snapshot 19w14b to Pre-Release 1, and when I loaded a specific village a bit away from where I initially loaded into the world the game crashed cause of a ticking entity. The ticking entity that crashed the world was a villager according to the crash report. I then downgraded back to 19w14b to try to kill the villager, but that specific villager wasn't there, it was in some sort of invisible state, not visible or anything. So I tried to remove the villager through NBT explorer but the tile-entity file for the villager was nowhere to be found. After some time of troubleshooting I decided to try to delete the specific region file for that village. (r.0.1-mca) to force the game to create a new village. 

After checking that the game properly remade those chunks in snapshot 19w14b I tried to update to Pre-Release 1. Then the incident occured again. A villager in the same village was corrupted and caused a crash. I then loaded the world in 19w14b and killed the specific villager that the crash report said caused the crash. Then reloaded the world AGAIN in Pre-release 1. Same thing, new villager was corrupted and caused a crash.