villagers dying while in minecart travelling in water

 

What I expected to happen was...:

Trying to transport Villagers to trading hall from breeder with minecarts, Have build Frillioths design which uses water along the top to move them into bays

What actually happened was...:

villager gets to water then suffocates in water

Steps to Reproduce:
1. Need to build trading hall (Frillioths)

2. Put Villager into minecart and send him into trading hall

3. Then watch as he suffocates in the water