This is an odd one.. My server is using Multiverse and Towny (not sure if the issue is coming from either of these two) but only ops are able to see all chat across the server. In the nether and end players can type and send messages in the global channel of world they're in but no one can see those messages; doesn't matter what world they're in. OPs and pex * are able to see all world chats though. Same in other worlds. Everyone in our main world is able to see the chats though.