Bug when trying to clone with cp --reflink=always

Hello,

I have a bunch of files that can't be cloned with cp --reflink=always for no apparent reason. However, if I copy the file before doign the clone it works.

Staces of a --reflink copy of the original file[1] and of the copied file[2]:
[1]: http://sprunge.us/UXOO
[2]: http://sprunge.us/TUVa

lsattr says that no interesting attribute is set on any of the files and I'm not sure what else to check.

Sincerely,
 Johannes Löthberg
 PGP Key ID: 3A9D0BB5