Expected Behavior

Entity is dismounted (as was true in 1.12.6.20)

Actual Behavior

Entity is seemingly deleted (flashes red but no drops)

Steps to Reproduce

1. Set down a boat
2. Place any rider inside
3. Pick up the boat

Version of Minecraft, Carry On, Forge/Fabric

Minecraft: 1.12.2
Carry On: 1.12.7.23
Forge: 14.23.5.2859

Screenshots encouraged