I suspect this is the issue. When you submit shortly after another submission, it gets turned into an upvote. Or of the other submission makes it to the front p

I suspect this is the issue. When you submit shortly after another submission, it gets turned into an upvote. Or of the other submission makes it to the front post, it gets all the attention, and nobody will vote for a duplicate or want to discuss the matter again. What it takes for this to happen is a second submission some time after the first, when the first didn’t attract attention. This gives the article a “second chance,” and HN is actually interested in good articles getting second chances.