OP, I also suspect there might be pain involved somewhere from what you've said.
If you are certain however that there's no pain then I recently read about a technique for dealing with spooky corners that I intend to try next time I ride a horse with this issue. Disclaimer! I have never tried this myself and I cannot now remember where I read it so if you try it then it's entirely at your own discretion! The premise of the article is that riders can inadvertently reinforce the spooky corner by anticipating it and riding more positively through it. This results in a negative association with that corner. The author suggests rather than riding more positively you actually back off and allow the horse to find rest in that corner and work it harder in other areas of the arena before returning to the spooky corner and allowing rest. Rinse and repeat. The theory being that the horse will then form positive associations with that area of the arena and no more spooky corner. I am intrigued and certainly see the logic in it so will be trialling it the next time I have the opportunity.
