This kind of things happen whenever I join a sever or going in/out the cave. The game fixes itself after one minute or so. Also, I can't drag the items out of the inventory, so I can't plant trees, add fuel, etc.
I was playing the game and I got stuck in this place, so I decided to despawn, so I used the c_despawn() command. After I chose the character there was I spawn in this place, and everything were gone. I am using the newest version right now.