Nikon D5300 pictures are coming out blurry

When I’m taking pictures in Autofocus on my Nikon d5300 the subject’s face comes out blurry. It’s not the camera shaking, the shutter speed was on 1/200. It didn’t help to zoom in, however, when I zoomed in on half a bench with a little bit of the background it was very clear. It works perfectly fine in Manual focus, Just not in auto. I’ve noticed it happen before but then it goes away until it comes back. Before I take the picture it looks fine and the right parts are in focus but not in the actual picture, the whole thing is blurry though in some the backround is perfectly clear. I tried locking the focus when I got it to focus on the face but that didn’t help. Anyone know whats wrong with it?