MR816s acting up under Windows?

Anyone else running MR816s under Windows 10/64 been experiencing ASIO spikes lately?

Mine have been working pretty well for a while, but just in the last couple of weeks, I’ve been getting weird spikes and I’m showing 1/4 of my processor’s (more than ample) power being used by an empty project.
Anyone know if there were recent Windows updates that mess with the FW drivers?

I did try reinstalling the current FW driver, and the legacy driver, neither of which seems to have any affect.