Formbook comment, "Not handle turns"

"Horse didn't like running left handed" I assume that means just course direction as different hemispheres run different ways, though this is a fresh save and a horse I bought as a cheap 2yo hoping to at least earn a little coin. I'm running America campaign so I assume if I buy horses in the future that when it says that to just sell it? Because if it only wants to do international courses (due to the running) I can see it being a little headache for a horse that definitely isn't top tier.
Thanks!