While I was building a mineshaft, when I was putting some activator rails, I noticed that when they were activated they ejected me inmediately when the minecart touched the rail.

This breaks mechanisms where a person needs to travel near a TNT Minecart and with a detector rail the explosive get activated, because the person can escape if the trap isn't in a small place.

There are 2 links to videos explaining better what happens:

1) Non-waterlogged: https://youtu.be/Ita9l4KUL4I

2) Waterlogged (And with other entities): https://youtu.be/iYzVA8t9ZYo

Edit: I forgot to specify that the Minecart ejected me too early. (Edit made the 14 December 2020)