Great question. I don't have an answer. But some thoughts depend on how you frame things. If by "causation" you have a certain model in mind (e.g. where something is transferred from cause to effect) then it does seem contradictory to say that 'something comes from nothing' -- if that is taken to mean 'nothing causes something to come into being' -- for that seems to require both that something be transferred from cause to effect (by the word 'causes') yet that there be nothing to be transferred (since 'nothing' is said to be THE cause) .... But who is to say that 'causation' should be understood on that model? And even that model would not rule out the metaphysical possibility of something coming from nothing, if what that means is 'something comes into existence uncaused' -- there does not seem to be a contradiction, or at least not an obvious one, in the latter, since no 'causation' is being implied .....

hope that's a useful start!

ap