The squiggles are a moiré pattern when the spacing of the pixels is close to the spacing of the stripes. For this reason you'll notice that TV people don't wear stripped clothes.
Not sharpening during Export and/or changing the resize-size to something where the stripes are not close to one pixel across should help. Whether that is feasible or not depends on what the resized images are for. If this is a smaller area in a crowd of people you might try blurring the shirt using an adjustment brush. If this is a large area of a main subject then that isn't an option.