server：Sponge Forge (spongeforge-1.12.2-2838-7.1.7-RC3777)
Forge：forge-1.12.2-14.23.5.2838-universal

Container was not captured. No ClickInventoryEvent will be fired! Container: class p455w0rd.wct.container.ContainerWCT PacketState: PrimaryInventoryShiftClick

I gave it an honest attempt. Unfortunately, Sponge and Forge just don't play well at times. Unless gabizou wishes to give some insight as to what I need to do to fix this, Unfortunately, this is where the trail to figuring out what is doing stops as it references the class org.spongepowered.api.event.SpongeEventFactory which when looking for this in the Sponge API's source, as you can see here, this file doesn't exist. Sorry :(