Chickens spawned by thrown eggs cannot move or be damaged, and cause world to crash

Baby chickens spawned via throwing eggs. all chickens spawned this way float in the air in the spot they spawned in, and do not move if pushed. They do not take damage if attacked. After about one minute, world crashed (report attached). Upon reload chicken act normally, but spawning new ones by throwing more eggs results in similar frozen chickens and subsequent crash.