Board Game Arena

https://boardgamearena.com/table?table=669154580

In this game I lost because an opponent used an illusionist to swap my leader, causing his own leader to get surronded. I'm confused, because according to the rules you are not allowed to let you leader get surronded on your turn. Is this a bug or am I interpreting the rules incorrectly?

Yeah that's a bug to me, I think you should report it

Bug !