He's 27, so at the peak of his ability. He will probably be maxed out CA-PA wise, so there's no room to improve. For him to improve his free kick rating, which looks like it has been set as his focus, other attributes will need to decline. It may have been a tiny 0.1 or maybe even less in each attribute, but it still went down, so that's why the arrows. There's no need to panic and if you actually look, you'll see they went down by very, very little.