I have also developed some difficulty with my draw shot over the past few months where I have been jumping the CB off the table which never really happened to me before. I think it has a lot to do with elbow drop and shoulder hiking.
Are you moving your bridge hand up and down when following and drawing? Some players, they don't realize it, keep their bridge the same and move their arm to go up or down for follow and draw. You might want to look at your bridge hand while you're shooting just to check.