This glitch only happens with bottles of experience!
When the player and the bottle of experience hit the portal at the same time, minecraft crashes.
Steps to Reproduce:
- Go creative.
- Build a portal to the nether / ender world.
- Start entering the portal and at this time kinte a bottle of experience (if the game did not crash - try again).
The game will crash.
The game will continue to run.
Enter the portal from the upper world.
Only works with bottles of experience.
If after several attempts it was not possible to crash the game (and the transitions from the dimensions occur quickly) - re-enter the world and try again to reproduce step 3.