Comment # 6 on bug 1208161 from Michael Hirmke

I found out, that if I wait for about 30 seconds before entering the LUKS
passphrase for the root partition in the plymouth dialog, I don't get the
additional boot time and the "timeout".
Instead I get

systemd[1]: Unnecessary job was removed for
/dev/disk/by-uuid/47c6783a-2b0$740*bd3$f0f43f63d8c.

as in kernel 6.8.1.
This does neither explain to me, why this crippled device name exists, nor why
waiting 30 seconds will help, but perhaps someone else can see whats going on
here.