Select one work for recording (with search) on http://beta.musicbrainz.org/release/e929e3ac-9d41-406b-801f-5257e01fdc04/edit-relationships and press "done". After that click "recording of" of the same work to replace this work with another one. Enter bf24bbf4-9c5c-3371-bbe4-a3b2254f8999 to title field. It finds the title of correct work but if you press "done" this work isn't really selected.

There's similar issues with replacing work by using search function but it does fail only sometimes.