Left 4 Dead 2

Left 4 Dead 2

Left 4 Bots 2
Smilzo's left 4 bots 2 my bots we have problem in a custom addon map and vanilla campaigns, when you go down an elevator, a bot teleports.
It's not like there's a bot involved, and you can just stand there and kill zombies, but then it suddenly teleports and goes down there and eventually dies. Is there a way to prevent the bot from teleporting at all?