Riding an entity into the end fountain skips the credits

If you ride an entity when exiting the end after defeating the ender dragon, you get teleported to the overworld without triggering the credits.

How to reproduce:

1. Open a new world, or a world where you haven't seen the credits yet.
2. Go to the end and defeat the ender dragon
3. Place a boat next to the exit portal, sit in it, and ride it into the portal.
4. No credits are shown

Expected result:

The credits should be reliably shown after defeating the ender dragon independent of how the player travels through the end portal.

 

Relates to MC-272596