CRAFTBOOK-3217 - Reported by Roadrider100

Once a mechanism sign is setup such as [Gate] or [Bridge], the text in the sign disappears after the first time of use and all the material in the process (wood,fence,etc.) is also gone. I'm using 3.9-snapshop of craftbook and git-Spigot-687a019-568e27f API version 1.10.2-R0.1-Snapshot. This happened after I upgraded spigot.

Comment by me4502

Duplicate of http://dev.enginehub.org/youtrack/issue/CRAFTBOOK-3206