Prevents opening Shopkeepers signs when installed

[lerokko]

The plugin Shopkeepers allow to make custom entities (including signs) that when clicked open a villager trading GUI. With this mod installed clicking such a sign no longer does anything. I do not expect the mod to support "signs" as they are not villagers but it should not prevent me from clicking the sign.

https://dev.bukkit.org/projects/shopkeepers

[FaultyFunctions]

I am also having this issue.