Does HN automatically change the title of post without human intervention?

I am aware that HN mods sometimes change the title of posts. This has been discussed previously:

https://news.ycombinator.com/item?id=37646179

However, my question is not about mods changing title or some automation removing numbers from titles or adding things like [pdf], [video] etc.

My question is about the title being instantly automatically changed upon submission.

For example, I made the below post:

https://news.ycombinator.com/item?id=45234649

The title I submitted was the same title in the article:

> Dinosaur egg dated directly for the first time

However, when the post got submitted, it had a different title:

> Dinosaur Egg Dated Directly

I feel like the "for the first time" is important part of the title which was removed.

Since the title had instantly changed upon submission, it was not mods who changed it.

Note that the HN guidelines say "Otherwise please use the original title, unless it is misleading or linkbait; don't editorialize."

So, why and how are the titles changed automatically?