First, the ref (or is it the assistant?) moves such that his left leg blocks the view of the sideline so it's hard to tell exactly when the feet leave the cylinder.
Second, watch how Haines is physically reacting. He somehow kept most of his body off the mat through a lot of this. He's using his hands and feet to push up and often turning into Robb. The screenshot is clearly OB as Robb's feet are clear of the refs leg. If this had been in the center - control isn't clear until right around the screen shot (maybe a few frames earlier) but that would have to be pretty short time allowed for reaction given how Haines was turning in.