The first option of bazzite on grub (it have the number 0) is your current deployment of bazzite,the below of that whit the number 1 is your previous one,try booting the previous (1)
this is more of a feature of bazzite, bazzite deploys a version to you as an all-in-one "image", every time you upgrade, you get a new image, what im asking you to do is go into the boot loader called grub and select an older image, essentially reverting back, to see if that fixes your issue
In this video, I will show you how to get into the terminal of Bazzite (note that this also works for almost any other Linux system) by modifying the grub boot entry. We then look at how to unhide grub, how to boot into the desktop mode and lastly how to rollback to a previous version of Bazzite.
I... why? I'd expect it's not, it's probably a very YMMV thing just because odds are none of the devs have put time into what is likely a VERY niche use case.
because I'm not sure how often bazzite gets new steamos features and I'd like to have the chance to try them out + I wanna try bazzite as a daily without throwing my steamos install in the bin. doesn't sound like a weird use case lol
But yeah Bazzite is basically fedora silverblue as far as that goes, so it should dualboot if set up right. No clue about how SteamOS handles that stuff though.