Witches that were converted from villagers are too fast

Steps to reproduce:

1. Spawn a villager
2. Summon a lightning bolt over them
3. Wait until the converted witch starts moving

Observed result:
They move twice as fast as normal witches (you can check using the attribute command: /attribute @n[type=witch] movement_speed get.

Expected result:
They move at the same speed as normal witches.