yikes! that is frustrating! Usually with skipped stitches, the culprit is the needle or thread. While you may be using the correct type of needle, such as a stretch needle, maybe the size is incorrect. Example, you’re using an 11 but maybe you need to use a size 14. I’ve seen examples of people having horrible issues with skipped stitches and then it vastly improves with a needle of a different size. Also, you want to make sure you’re using good quality thread. another option is to adjust the stitch length and see if this helps.