Farrul's beast portal BUG and beast captured

Open a portal for Farrul, First of the Plains with Farrul's beast. In the phase that he throws you into a room with several beasts, open a portal, when I was finished the room I took a DC. Returned, unable to return to the main room, even cleared the map, there is no way to return the confrontation. I lost all the portals in an attempt to return the fight. Some captured beasts are not appearing in the book making it difficult to complete the challenge.

Farrul Den