Minecraft windows 10 edition bug

Hi! I had a world in Minecraft Windows 10 editon, that I created before the 1.11.1 hotfix. I spawned near a village and it had a lot villagers. After the new update, 1.11.1 hotfix I can't find any villagers in my world, but I find a lot zombie villagers in the village.. I am 100% sure, that there were no pillagers. Can you please help me?