Spot on Augie, it was an alignment issue. I pried the forward end of the switch and mount inboard just a bit and operation is back to normal. Thank you for the keen eye!
The only thing that frustrates me is it was working fine, then I had it at the dealer to fix exhaust mounting, then it developed this problem. I didn't touch the mount, certainly not hard enough to bend it out of alignment, so I wonder if something happened in their shop.