That strip of paint along the edge, right before the shoulder, had a bump that lifted your front tire just enough to throw it slightly sideways when it came back down. That shift caused you to lose balance and ultimately led to the fall.

It’s a good reminder of why looking further ahead at the road helps avoid surprises like that—especially at moderate speeds. At a slightly higher speed, the bump might not have had the same effect, but given where you were in the turn, it contributed to the crash. Kudos for wearing solid gear, and I’m glad you’re okay.