Your experience sound s a bit familiar to when I reverted back to a 5.14 kernel, found things worked, then booted back into a 5.15 kernel and it worked again…
What this experience informed me was that I was suffering “USB dropout”… as each reboot would either be flawless… or my mouse or BT would not be working (things under USB).
I feel an updated BIOS firmware helped (AGESA 1.2.0.0 => 1.2.0.2 in my case), but I can’t discount the kernel updates helping either.