It may not even necessarily be the submitter themselves that has resubmitted it — I’ve had posts I’ve submitted that have gotten low traction get resubmitted (not by me) hours later (but still with me listed as the submitter). Guessing it’s something the moderation team does when they feel a submission didn’t get enough traction the first time.

Edit: Never mind, I see that’s not the case here after looking at their submission history!

HN ignores dupes when the original got little traction.

Ah. Guess I still have some learning to do with how things work here a little differently than elsewhere.