It was fixed, was a case of the potato :D

There's still some frequent co-op disconnects in the game, my friend and I identified two causes:

* In general play, if someone has the "auto-aim" option turned on for teleporting it seems to cause a disconnect when it triggers.
* For level 9 (The first boss fight) a disconnect occurs shortly after the host damages the boss. The client *must* be the one to strike the boss every time. At the end after the final blow the client may end up stuck in the mission, but should continue to the end screen when the host goes on from it.