Darth Android is correct. Just send a PE to the mods/admins. They will assist you by checking who where the last people who took/placed items in the chest. I'm pretty sure you will get all of your materials back. Hopefully you will.

This wouldn't be happening if the curse/profanity censor is on, but the mods were fixing/updating the chat.

The "Tree assist: Removes the entire tree" can benefit all. It's hard to chop down those trees with wood blocks everywhere. But "Tree assist: replants tree's upon cut" really isn't necessary.