hello, I've been trying to make my spare USB a LUKS decryption option for my PC, with my passphrase as a fallback for if my USB isn't connected, I was able to make LUKS see and use my USB to decrypt my drive, but when the USB isn't present, it refuses to fall back to my passphrase and gets stuck in a loop searching devices and have to reboot and connect my USB to get into my PC and revert what I did to get it to ask for my passphrase again, how can I get it to have both options?