I don't know what part of this helped, but when I put a villager in a boat inside a portal, and then hurt the villager, he went through the portal successfully. Perhaps I'll try to find an MWE.
Kevin Orr
I don't know what part of this helped, but when I put a villager in a boat inside a portal, and then hurt the villager, he went through the portal successfully. Perhaps I'll try to find an MWE.