I gave KB a call and eventually got on the line with one of their engineers. He had me do a few things and send some pics. In his estimation the TB seemed fine, but he said I could send it in and have it refreshed/repaired for $200. So that's an option for you if greasing it doesn't work.
I’m going to ride this out to see if I can find a fix for it. It seems the more I drive the car - the less it occurs. It’s very interesting that there’s a few of us having this exact problem right now. That leads me to believe that it’s something very simple causing the problem.