Quibble doesn't work when CSM is enabled

[wozniak]

When I load Quibble it shows it loaded ntfs.efi and btrfs.efi successfully and then after a second it either boots the next boot option (if booted directly) or returns to the bootloader screen (if chainloaded).

I am on an ASRock B450m Pro4.

If I disable CSM, it gets stuck at 'Booting Windows...', but I don't think that's Quibble's fault since something similar happens with the default Windows bootloader when I don't have CSM on.