Could be but I don't know QM well enough to say for sure.

If I understand it correctly, the collapse of the wave function is when the probabilities change at the moment of observation or measurement. So if one holds that the wave collapse is a metaphysical event (and you agree with Jaynes that probabilities are epistemological) then that would be a case of what Jaynes called the mind projection fallacy. Much of the debates in QM regarding wave collapse revolve around exactly this point. Of course, camps have formed on both sides of the dichotomy and I don't think it can be resolved by just asserting that probabilities are epistemological. The error is deeper than that and I suspect QM needs to be derived from bayesian principles but I am not sure that bayesian probability theory is yet up to the task. The situation is very similar to the ancient debates on whether color was a property of the object or in the mind, which makes me think there is an object/subject distinction that is being missed.