Dolphins don't dismount minecarts when passing over activator rails

Test steps:

1. Set up a Activator rail with a Powered rail and place a Minecart on the rail (See screenshot for more information)

2. Place a Dolphin in the Minecart

3. Push the Minecart to get it moving

4. Note that the Dolphin doesn’t dismount when passing the Activator rail

Expected result:

The Dolphins should dismount the Minecart (like other Mobs do) when Passing the Activator rail

Actual result:

The Dolphin stays in the Minecart when passing the Activator rail