I'll take a stab, but I'm basically a layperson as well, so take this with a grain of salt. Causality would be tough to apply I think because of the quantum na

I'll take a stab, but I'm basically a layperson as well, so take this with a grain of salt. Causality would be tough to apply I think because of the quantum nature of the interaction. The object initiating the motion is quantum as well, so it's tough to say precisely when it should interact. So it's not as if the object is "anticipating" the interaction, it's that the quantum field already is interacting before our classical intuition of a non-quantum particle would say it is. At least, I think :)