@oleg-knysh You may also be interested in trying out an experimental init.xz that uses a newer version of partclone. Though the github issue does not indicate this resolves the issue for them, perhaps it will in this case. It’s worth a shot anyway.
https://drive.google.com/file/d/1u_HuN5NSpzb7YmQBAsrzDELteNmlWUWU/view