Sorry guy's but that post is so outdated from 2019 that I should have DELETED it years ago, when no-one responded.
Thanks for the comments though.
Cpt dan, I believe you are correct.
The answer to my original question about the 2019 Rossi was --- lever lip of the closure spring area was hitting the trigger assembly. I eased the trigger assembly lower leading edge. The lever now misses the trigger edge; comes up closer to the back of the trigger tang; and locks-up better.