Just booting the live image shouldn’t change anything on your computer. It’s a safe way to check if the distro is compatible with your hardware.

I agree it shouldn’t, but it appears to do so. I’ll see if I can reproduce it again, and if so I’ll file a bug. It’s just so strange I’m still not 100% sure if it isn’t user error somehow…

Well I can’t repro it. I’m reasonably sure it installed the deb version of a package through an “Update”, even though I just installed the same app as a Flatpak moments before. But now it doesn’t seem to happen anymore with other apps. I tried Audacity and a few others. Anyway, strange…