I have a similar issue! Spent ages designing and small scale testing my own little villager minecart transport system which basically runs in a circle from an infinite breeder through a trading system. Built the whole thing on a larger scale in survival only to have some of the activator rails fail to work properly every single time.
After a bit of messing around in creative I figured out that it seems to be specifically if the tracks are oriented east-west and you're trying to get the villagers to eject on the SOUTH side of the activator rail. Ejecting them on the NORTH side seems fine, as does north-south rails ejecting east or west.
IamKanlor
I have a similar issue! Spent ages designing and small scale testing my own little villager minecart transport system which basically runs in a circle from an infinite breeder through a trading system. Built the whole thing on a larger scale in survival only to have some of the activator rails fail to work properly every single time.
After a bit of messing around in creative I figured out that it seems to be specifically if the tracks are oriented east-west and you're trying to get the villagers to eject on the SOUTH side of the activator rail. Ejecting them on the NORTH side seems fine, as does north-south rails ejecting east or west.