This has started happening to me constantly in Amazon! I start searching for something, make a typo, go back, then somehow it snaps back to the typo before I hit enter and I get bad results. Super annoying, I don’t remember it being a thing before a year or so ago.
The ebay search button has been like this for ages. To the extent, that sometimes, you correct your search query, hit enter to search and it resets back to the previous search query and re-searches that!