When I sew over pins my machine skips a stitch right after the pin. The one stitch is longer then the rest of them. My stitch is set at 2.5 but when I go over a pin it looks more like 3.5-4. It only happens when sewing over pins, all the rest of the stitches are fine. What would be causing this? I have changed needles but that didn't help. Everything else is fine.
Thanks