Citação Postado originalmente por _[OnlyLove]_ Ver Post
On some maps like Vulcanus / Arena .. items picked up cannot be thrown out .. other maps can be thrown ..

This error has been encountered for a long time, becoming more and more annoying, I hope the administrator will consider and fix it
It's a visual bug, the item is removed from your inventory, but visually it stays there, restarting the game you solve this problem.

Anyway, i'm going to report it for verification.