I took my friend for a quick run around the block. I turned my VDC off so I could add my lines to his burnout spot. When I lost traction, the SLIP light came on. It doesn't make sense why the SLIP light comes on when I have VDC off. It didn't cut power or anything, the light just flashed then went off. The light doesn't come on every time I don't have traction, it just does it at random. Any insight into this?

And before anyone asks, I did search. With no luck obviously.