I'm having this same issue. trying to move a couple dozen villagers and 2 out of three will not go through on the Nether side, been working on this for two days. Every once in a whole I'll try and to push them through again and they just stand in the portal.
Also, I had one Villager go through and then come back and then he wouldn't go through again, so I had to set him aside as well.
Atomik Crafter
I'm having this same issue. trying to move a couple dozen villagers and 2 out of three will not go through on the Nether side, been working on this for two days. Every once in a whole I'll try and to push them through again and they just stand in the portal.
Also, I had one Villager go through and then come back and then he wouldn't go through again, so I had to set him aside as well.