Can confirm. Once dang pinged me directly by email saying that my story was re-upped. The story went again to the frontpage and the date was adapted (IIRC), but the comments were kept:
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Hi denysvitali,
The submission "PostmarketOS-Powered Kubernetes Cluster" that you posted to Hacker News (https://news.ycombinator.com/item?id=42352075) looks good, but hasn't had much attention so far. We put it in the second-chance pool, so it will get a random placement on the front page some time in the next day or so.
This is a way of giving good HN submissions multiple chances at the front page. If you're curious, you can read about it at https://news.ycombinator.com/item?id=26998308 and other links there. And if you don't want these emails, sorry! Let us know and we won't do it again.
https://news.ycombinator.com/pool (specifically, this post can be found on page 8: https://news.ycombinator.com/pool?next=43673425)