I had the exact same problem once Seewolf.
I reloaded a previous save (When I entered the base after Mira opened the door.) it took 3 reloads before it actually made it past Kreia and the Wookie.
I am still not sure what went wrong, but on the last try I saved at the top of the ramp leading to the arena. Perhaps that save fixed my issue. Only happened once out of 6 play throughs.