When a player tries to travel through an end gateway while riding a boat, one of the following bugs can happen for gateways generated in the end:
- Player and boat are teleported, chunks are not loading and constant server warning "Boat (vehicle of [Player]) moved too quickly!"
- Only boat is teleported, chunks unload for player and once server warning
And this happens when creating a custom end gateway:
- Yellow beam appears and client renders about every second teleportation but boat and player stay at their position
- Kill the EnderDragon
- Try to travel through the portal in a boat
Note: This works fine for Minecarts