I have had the same issue for nearly a year now.
|$ uname -a||||Linux debian 4.9.0-2-amd64 #1 SMP Debian 4.9.18-1 (2017-03-30) x86_64 GNU/Linux||
|| ||$ lsb_release -a|| ||Distributor ID: Debian|| ||Description: Debian GNU/Linux 9.0 (stretch)|| ||Release: 9.0|| ||Codename: stretch|| || ||$ apt-cache policy xfce4|| ||xfce4:|| || Installed: 4.12.3|| || ||$ thunar --version|| ||Thunar 1.6.11 (Xfce 4.12)|| || ||$ terminator --version|| ||terminator 1.90|