After the bot played Lurker against me, it just stopped. Didn't make a choice for Lurker and sat there forever. I don't think the bot buys Lurker but it will play it if passed via Masquerade.
game #400 on frankfurt-test2
//edit: Giving the bot a Lurker via Swindler is another way to make it play it and freeze. Haven't tried Ambassador but I guess the bot would still just play Lurker and stop.
game #404 on frankfurt-test2