This happened to my horse, he just had to get used to the new angle and then he was fine and totally sound.
When it got straightened and corrected by the farrier, my horse moves off so we try to stay with his wired angle
My horse had a similar problem when I got him his feet were growing in weird ways but I got a farrier that specializes in barefoot trims. Shoes are so bad for horses. Also nutrition will play a big part in how his feet grow. My horse now with proper nutrition and some correctional trims his feet are now growing straight. My horses was caused my bad nutrition and bad trims in the past.