I bought one of these from HJE a few months ago and finally got around to using it. It disengages on the backswing if you are ratcheting fast. Did I get a faulty ratchet?
I would call SK or give Jori a call at HE, I haven’t heard of any issues with the New SK ratchets. It sounds like the same issue i always had with the 60+ tooth Apex ratchets, the selector would get jammed up, take it apart, inspect, reinstall and everything would be good for a day, maybe a week as there was no Rhyme or Reason.
Mine works flawlessly. I did have one minor issue right out of the package, it was almost completely dry inside, so it ratcheted kind of crappily, no issues with disengaging or locking up though. I opened it up an put in a few drops of Super Lube oil and it has been great since.