I've never experienced that with 9mm, whether lubed or not. I would look at cleaning the brass thoroughly (if you haven't already) and cleaning the die thoroughly (if you haven't already). If that doesn't help, the die could possibly be undersized. Don't get me wrong about Lee, I like a lot of their stuff, but I know them as a company, and I've had a few items from them were slightly out of spec (undersized boolit sizer die, out of spec turret head for LCT press, borderline undersized boolit mold to name the prominent ones), so it's worth considering that the die might be undersized or slightly out of spec.
Also, inspect the die and ensure it actually has the carbide insert ring. This is actually the sort of behavior I'd expect from a non-carbide die if running without lube.
It's also possible the chamber the brass was fired was significantly oversize. Without an unsized piece of brass, however, there's nothing to measure to confirm that.