Unlink clone doesn't work if clone has clip-path

Steps to reproduce:

• open Inkscape
• open attached file inkscape.svg
• unlink recursively or select the path use7641 in the XML editor and unlink

What happened?

Path is not unlinked

What should have happened?

Path is unlinked; clip-path is applied again

Inkscape Version and Operating System:

• Inkscape Version: 1.0beta