I use "DiceFurniture Plugin / Möbel Plugin 3.2.1.2" and players can place the objects created by the plugin: https://www.spigotmc.org/resources/dicefurniture-plugin-m%C3%B6bel-plugin.6006/

you can fix please!

Protect zone?!

Imag: http://dl3.joxi.net/drive/2017/12/03/0009/3525/597445/45/2fdb15dde3.jpg

I think this is not a PS issue, you have yo contact the dev of that plugin and ask to add support of PS.