Jan Petrischkeit

Just tried it with the newest snapshot - no change. Villager often don't get ejected.

I had this issue, too. I was testing an idea involving villager transport. Villagers sometimes got ejected, sometimes not.

It seems to me that it has to do with the movement of the mobs (villagers) itself (at least sometimes). If the villager is ejected, he sometimes starts to move immediately (especially when trying to go back to his village). If this movement goes in a similar direction as the minecart is moving, it re-enters the minecart immediately - even when surrounded by blocks and the railway track being covered by glass blocks.

Well, this renders mob transportation systems quite unusable because its impossible to definately eject a mob from a minecart.

Possible solution might be to stun the ejected mob for a moment to have the minecart get out of reach.