Same thing on my 2011 Vision. Has done it since new with the factory oil as well as the Shell Rotella I use. After it's warm, it doesn't do it anymore. My guess is that my bike sat for quite a while, and the clutch plates stuck together somewhat.... they actually had to crack the clutch loose before I picked the bike up. I'm thinking that when the clutch wears out, and I put new plates/fibers in, it'll go away. I could probably do it now, but it doesn't bother me enough to tear it apart. And, even though it's under warranty, I can't see making the dealer do something I have personally done myself on previous bikes.
2011 Silver/black Vision, Ness Big Honkers, Ness Twin Sucker, PC-V w/AT, Lloydz VM1-DR cams, Lloydz Adj Intake, Lloydz Variable Timing Wheel.
2006 110" (133hp/142tq) +nitrous Kingpin (sold)