http://www.ecocitycraft.com/forum/threads/pet-rider-bug.98912/

Minecraft Username: Georgie0417

Brief Description: You receive no fall damage after getting off your pet. When you get off your pet and you right click on pet, the plugin believes you are still riding it. You have to do /pet ride in order for fall damage to return.
Edit: Switching worlds also returns the fall damage.

Instructions: Do /pet ride then either left shift, or get pushed into 2 block deep water, then try to take fall damage.

How many times did you recreate this bug?: 4 times.

Result: No fall damage.

Expected Result: Fall damage.

Evidence: N/A