villagers in a minecart will pop out when infected

What I expected to happen was...:
i was testing villager trades and curing when i found out that villagers won't stay in their minecart when infected

What actually happened was...:
because of the mob change the infected zombie plopt out of the minecart

Steps to Reproduce:
1. put a villager in a minecart
2. infect it
3.the zombie villager will step out of the cart