Experiencing this as well. If Bodert is played as a Bury then sent to the discard pile as a result of a successful Knowledge roll. He remains stuck there and can not be moved back in play by Lem's exchange power or by Ameiko Kaijitsu or Cyrdak Drokkus. Using either of these card or a location power to will lock up if Bodart is the only choice to select as a discard. Outside of this, Playing a Cure will return Bordart back to the the Draw Pile as normal. All these powers seem to work as normal if Brodert is just discarded to explore.