If this is a known problem, I apologize. I tried looking for it but I couldn't find anything similar. Introduction I bought the game a few days ago. It worked fine until I alt-tabbed out. Now, when I try to use an item from my hotbar, it jumps immediately to the first item. It does it now without alt-tabbing out. I think it might be a problem just in this world but I haven't make a new world to check. What happens Whenever I press 2-9 and try to, for example, swing a weapon, it'll switch to the first item and use it (swing if it's a weapon, consume it if it's consumable, etc.). Oddly, if I press and hold any key 2-9 and click, it'll work fine. For example, if I have a weapon in slot 6 and I press and hold 6 on the keyboard and click, it'll swing the weapon. Also strange is that if I click and hold on any slot except the first one, it makes a very fast but faint ticking sound. Conclusion I'd love to resolve this issue because the only way I can play now is to keep the inventory menu open. It's more time consuming to switch weapons and that's very frustrating when I'm trying to mine and fight out zombies.