I think this could have something to do with incompatibilities between
the ubuntu kernel and the zfs system. Basically the kernel overtakes the
zfs system and becomes too new to work with the zfs system

See the file I attached (dump.txt). It seems to me, that the kernel
assumes some symlink functionality to be present in the zfs system, but
it is not. It is from dmesg during boot. The system eventually boots
anyways.

Solutions:

1) Downgrade the linux kernel to the latest compatible version. I think
that is 6.8.0-50-generic. For now I am back on 49 simply because I had
that on my disk.

2) Upgrade the version of zfs so that is compatible with
6.11.0-24-generic. Ensure the symlink functionality works as intended.

I think this could be the root cause for the unability to enter a
passphrase - if initramfs uses symlinks in the zfs system.

** Attachment added: "dump.txt"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2092649/+attachment/5874020/+files/dump.txt

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https://bugs.launchpad.net/bugs/2092649

Title:
  Can't enter passphrase for encrypted disk on splash screen after
  kernel updated to 6.8.0-51-generic

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