Hi, I have only one world that has a feature that I love but for some reason any other world I create it's just not there. I checked everything but still can't find why. The feature is when I click the middle button to pick up a block it automatically goes to slot 5 in my hotbar everytime. This is very helpful because my first slots are filled with important weapons and tools. This specific world was recently converted to 1.16.5 and it still works. Is it a bug or am I being a noob and not getting it?