Can't find this anywhere else. I play only on peaceful, regularly my villagers continue to disappear. I breed more and sure enough they disappear again. Put name tags on about 12 of them and when 1.16 launched all of those tagged ones disappeared. Playing only on peaceful. Villagers are in a walled area, the only way in and out is iron door with button. Gollems not despawning. Would love to know if it's a bug or if perhaps I did something wrong. 

Thank you for any help.