How to Fix the Loose Stitch after a Cable

Lucy Neatby has a great video on this topic.

To understand normal stitch orientation. The yarn goes over the needle from the front to the back. The front leg is on the right, the left leg is at the back.This is the usual way stitches sit. Some knitters work in a different way if your stitches are created with a different stitch orientation you will need to adapt the instructions.