Is this a new pattern or has she done this for a while? I kept my horses barefoot for several years and some of them would twist and cross over on landing with their back feet. I’ve since gone to shoes on all but my mustang and my two thoroughbreds are moving so much better and more evenly. Make sure her hooves are balanced and even on both hooves. It’s easy to have one side of the hoof higher than the other or one hoof a different length than the other hoof. Once you make sure she’s balanced, then you could try a chiropractor but it would be a waste of money of her hooves are still unbalanced. Good luck!
Only perfect practice makes perfect.