We’ve found a bug on the server, which basically gives the player the
opportunity to store their spells in a chest.

This is how it works:

1. Open your wand inventory.
2. Right click a chest to open it.
   3.There’s a really short ‘delay’ for the chest to open. When it is
   ‘opening’, look down and right click a grass block.

The chest should now have opened, and your wand inventory should still
be open, giving you the possibility to store your spells in there.

This seems to be lag-related, which is making it hard to reproduce.

I have a maybe-fix for this, but can't really test it since I can't reproduce the problem. I'll have to wait and see if someone else can verify it.

f0bc676

Finally got this tested (PW had been testing with the wrong version), fortunately looks like it's fixed.