this has been covered quite a few times. The reason your body is "leveling out" is because of one of two things: Your rope position, or your body position leaving the wake.
Rope: Try to keep it as close to your lead hip as possible
Body: you need to be taking a progressive edge through the wake. Most likely, you are edging really hard, then letting off, and just coasting in, which gets your body leaning the wrong way, and kinda whips you forward, into a faceplant. If you dont understand what a progressive cut is, google it. Im tired ok.