In this video, I run through an occurrence I see pretty frequently on dropper posts that are not functioning correctly. It generally either happens when lowering a dropper post height, or sometimes when initially installing a dropper post. The main point to remember, on any internally routed post, always feed the cable in, or pull it out if you're adjusting the height of the post. If the post is just pushed down into the frame without some outward pulling of the cable where it exits the frame, you will likely run into this issue.