I used to always shoot bows from 64 to 96 pounds at my draw length. My daily exercise was to work out with my chest pull with extra springs added or draw two 64 pound Schulz longbows at the same time twenty pulls left side and twenty pulls right side. The 64 pound bows for years felt like toys, but when I would try to shoot light weight bows of 55 pounds or less, my form would fly apart. My analogy is the one empty bucket mixed in a fire bucket brigade line of full buckets. When getting handed the empty bucket the fireman would throw it in the air expecting more weight. When I started dropping away from the heavy bows I needed to do it step at time. When I was forced to shoot light bows, due to a couple of injuries, one from lifting weights and another from getting hit at stop sign, I had to learn to draw slower and think about planting my anchor. I shot a doe that weighed 150 pounds with a 36 or 37 pound Hill at the exact same spot that I killed a similar sized buck with a 96 pound bow two years earlier. The only difference was the amount of pass through.
When shooting a lighter bow, I had to ask myself is my release going to be based on my full draw form out of habit, or is it going to be based on my full draw aim. Once I got that notion planted in my head, it was easier to shoot the lighter bows. One of the flaws of the Hill form is that it is so automatic and fluid that one has to work at keeping the form consistent. It is very tempting for the automatic pilot to let things get more and more fluid, to a point where the draw length, anchor and power lines start to degenerate. If your symptoms are similar to mine, I would suggest to concentrate, when practicing in close, on trying to have your release become aim motivated without greatly altering your natural shooting rhythm. You may need to slow your drawing speed down a little at first.