Would you call "the law of causation" a "physical law"? I think it's more of a philosophical/logical necessity than it is a physical law. Are you trying to say that since the laws of physics break down at the Planck scale, that the laws of logic do, also? What about the laws of mathematics?
All of those things happen
within the universe. We have no reason to expect them to have to happen to the universe as a whole.
I don't think there is any warrant for making the laws of metaphysics dependent on the laws of physics.
There's no such thing as "laws" of metaphysics.