On the final stage of the Japanese Breach castle, the attacking (orange) players spawn directly onto the map. This means that the defending (blue) team can attack the attacking team as they spawn in. I just played a match where the defenders were able to use their charged or regular heavies, GBs, etc, on my hero before I fully spawned into the map, and so was unable to defend myself. Its a very annoying problem. I am not sure if other breach maps have the same unprotected spawn area.