I think you could add this patch to libxfcegui4. The patch is confirmed by upstream and already included in OpenSuSE (url: https://bugzilla.novell.com/show_bug.cgi?id=104022&x=0&y=0) Reproducible: Always Steps to Reproduce: 1. 2. 3.
There is already a bug about this issue #102912
*** This bug has been marked as a duplicate of 102912 ***