Hello Tobias, i have filed a bug report at Debian and Samba as they have mentioned it to be the best way to sort this out. Please feel free to help out on this wherever you can.
It believe it´s a thing that must be fixed at Samba. https://bugzilla.samba.org/show_bug.cgi?id=11854 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=821801 Greetings!
