[BUG] linux-cachyos 6.19.9-1 and lts 6.18.19-1 breaks boot, bails to emergency mode

[plz12345]

Pre-flight checklist

• I have searched existing issues and this is not a duplicate.
• I have read the Contributing Guidelines.
• I have verified the issue is reproducible with the latest available CachyOS kernel.

Upstream / vanilla kernel check

I was unable to test with a vanilla/upstream kernel

Kernel variant

linux-cachyos (EEVDF, Clang)

System information (cachyos-bugreport.sh)

https://paste.cachyos.org/p/d0d9622.log

Manual system information (if cachyos-bugreport.sh is unavailable)

Bug description

The latest version seems to break the boot configuration or at least fails silently and very ungracefully. I was able to restore a snapshot, but repeating the process repeats the failure. For now, I'm only updating packages that are not the cachyos linux kernel or nvidia drivers. I don't think the bug report catches the failures, since restoring a snapshot is a multi-reboot process.

Steps to reproduce

1. sudo pacman -Syu to upgrade to latest kernel
2. Install is fine, no errors or warnings
3. Reboot
4. Crashes to emergency mode instead of showing logon prompt. Unable to mount /boot, no network stack.

Note, this happens late in the boot, as it does show the CachyOS shimmering logo, then then plain white one I'd normally see right before the logon prompt. Happy to provide other info as requested. Tis is the first blocking issue I've run into with CachyOS (6 months in).

Expected behavior

Graceful upgrade and reboot to logon window, or at least throw a reason why it bails to emergency mode.

Actual behavior

Computer boots, crashes out to emergency mode prior to logon window displaying.

Logs / stack traces

Additional system information

No response