Not exactly the same issue but I have pain in the same area that rears it's ugly head pretty consistently after about 2.5 hours into a ride. The area, (left knee on the right side.) is even sore to the touch. Nsaids aren't helping at all, time off didn't do a thing either. I tend to blame all these types of things on being an older rider but if it keeps up I'm going to have to go see the doc. Good luck on find a solution to your ailment, I wish I had some actual useful info.