I'm also starting to experience this problem, except it's only been happening since 7.1. My PS5 will randomly and completely shut off while playing XIV. I also chalked it up to overheating at first and cleaned out the console, and everything seemed to be fine after that...until it shut off again a few days later while playing XIV.

From what I've observed, it's *only* XIV that is causing it too. My PS5 doesn't shut off by itself with other games/apps such as Genshin Impact/YouTube/etc, no matter how long I'm on them. So it's hard for me to claim hardware failure.

Right now, I'm launching the console in Safe Mode and doing a system software update from there, and I'm also going to do a fresh install of XIV and see if that helps. I'll also try the 1080p resolution if possible. If XIV is still shutting down my PS5 after all of that, I have no clue.