penny-farthing Since nearly 4 years I work with Solus on my computer, I've just installed the packages hplip and hplip-drivers and I use simple-scan for scanning my documents without any problems until recently, as explained in this post.
this may even be beyond hp and something happened recently that had a big big ripple effect re: the law of unintended consequences when it came to scanners & printers lately. it's too many stories/threads like this on a short timeline. far more than the ordinary and certainly not coincidence.
it's not conspiratorial, it's a bad marriage of a handful of elements whose effects/origins haven't been tracked down yet because only a minority of general print & scan users (all hp, brother, epson in my observation) are effected.
I have fought these wars in linux (printer & scanner) for years until I caught a break: solus packaged the printer drivers and flatpak packaged the scanner drivers. but no one's hardware lasts forever so I keep a close eye on the abundance of these threads re: "It always worked this way, now it doesn't" is another wrinkle in these threads for sure.
spitballing and speculating, of course.