Per jumping, what is the approach/takeoff for terrain, and your actual body loading/unloading?
Different approaches may benefit from different preloading and/or body placement. Some cases you want to “bunny hop” vs other where you actual center/preload like a MX bike.
Generally speaking, if you are landing rear heavy, I wonder if you are pulling up too hard on the bars (in effort to clear the gap) and getting too much weight transfer to the rear, that ends with a heavy and low hit.