John K Jordan
I have the 22-44. I haven't seen the problem you mentioned but maybe it's because I usually sand fairly short pieces. I never push down on the wood on the infeed side, I just let it feed.
When a short piece like a small diameter bowl blank (maybe 7" long) is about to exit the sander the front can be raised a bit the front off the belt causing "snipe" at the rear. I prevent this by holding down the front of each blank as it exits - very little pressure, just one finger is enough. If I sanded longer boards by myself I would use properly aligned infeed/outfeed support.
If the feed rate is too slow because of trying to take off too much at once I quickly back off the crank then run the wood through again taking lighter passes.