I saw the scaffolding last weekend when I was there. It looked like they were maybe just doing an exterior refurb (repainting/ etc). The ride itself wasn't impacted.
Again, not me in the picture you posted, but we were at MK this day as well. Not until later in the day though. We started out at AK then hopped on over to MK. I remember seeing some of those people at the park that day.