It should be able to stitch over pins (straight across only, not alongside or diagonally), but yes it might cause a skipped stitch, I'm not sure how reliable it is. It's one of those things we really should not do, but we do it anyway. It's not as much the machine as the needle type that allows this. If you happen to have a package of very old needles they will break. I think this was a new feature some time in the late 1950s (at least well established by 1965).
Skipped stitches; double check for needle in the correct way, correct threading of the needle and bobbin case, correct needle type (130 aka 705 aka 15x1), cleaning of the groove behind the needle clamp and bobbin - feed dog area in general.