I've got a really strange issue... I haven't ridden a lot lately but this has happened every time I get on the bike, so at least once or twice a week for the last month. This usually happens once when I first get on the bike, and then often throughout my ride. When I put my right foot on the pedal the first time and then pretty much any time I land a decent size gap, my right ankle totally folds, with my foot going inward. I have no other ankle pain, but this literally puts me on the ground out of nowhere and hurts like hell. 2 minutes later, I'm totally fine. Anyone ever had this? Should I get checked? Thanks.