Minecart entering a Portal after ejecting you out by an Activator Rail and entering the Portal yourself will kick you out of the game.

Steps To Reproduce:

1. Make a nether portal
2. Place a lit activator rail and an extra rail directly leading to it(Screenshot).
3. Place minecart on the rail and ride it forward until you got ejected.
4. Enter to the Nether.

Observed Results:
Game kicks you out.

Expected Results:
Player should enter the nether normally and see the minecart there.