Crawl mode don't get disabled when riding

Steps to Reproduce:

1. Start a new world, and use trapdoor to get into crawl mode.
2. Ride a nearby ridable mob(like horse & donkey) or a boat/raft/minecart.

 

Result:

You are always in crawl mode which seems funny until you dismount.

 

Expected Result:

When riding, disable crawl mode.