https://bugzilla.redhat.com/show_bug.cgi?id=1046006
--- Comment #2 from Miro HronĨok mhroncok@redhat.com --- Oh, are you using Quick slice from file menu? I can reproduce it then.
This should fix it: https://github.com/alexrj/Slic3r/commit/5470fbbebc1d4ae5eb09196fd2c36ff3515d...