It was a pretty smooth face to begin with, and the initial "bite" was pretty rough. I reduced the cut for a second pass and it was still pretty jumpy.
It is possible (actually likely) that the blades are dull as it's been a while since I sharpened them, though it doesn't get a lot of use.
Looks like I've got a couple of projects to occupy my social-distancing time.
Thanks for all of the input.
Stay safe and stay well.