Screen turns black with AA enabled

I’m getting a black screen on my iOS build if I have AA enabled.

What’s even odder about it is everything is fine, until the player dies → screen goes black (UI visible) → respawn and everything is visible again. (video : Dropbox)

The only way I’ve managed to stop this happening is to disable AA, but then it looks pretty horrible. Is there a way to have AA on iOS without this happening ?

Fix appears to be: turn off AA in the LRPW, and use the post processing stack to do AA.