Invisible villagers

In my world, I have created a flat area to make a village in, and I have noticed recently that some are becoming invisible to me but not to others. Almost every time I visit the at nights they are floating in a sleeping position and sometimes flying away (more on that in this issue that is actually not resolved: MCPE-43464) In the morning anyone who is in my world via Xbox Live or LAN, can see the villagers back but I can't. The weird thing is, sometimes I can see the floating villagers and others can't. Please view my comment in MCPE - 43464 as I think I know the problem to the floating villagers is.