If two minecarts collide with each other one will stop and the other one will bounce back. According to the laws of physics both minecarts should either bounce back or come to a stop (depends on the type of energy transfer)

Reproduction Steps

• Send two minecarts on a collision course with each other

Observed Result

• A randomly selected minecart with stop while the other one will reverse directions
  thermodynamics violated.mp4

Expected Result

• Both minecarts would reverse directions or stop