They still run, but I do get the impression that they are LESS LIKELY to run if they are hit by Ruptured Tendons - this was from way before, not just recently. Tbh, I do feel like, "OF COURSE they are not running now that they are ruptured". But then, they do stand still occasionally even if not ruptured. So it could just be a "you see what you want to see" thing.