手持无限附魔弓，背包里有两种箭且前面那种是药水箭，往地上射一箭并且不要去捡起来，按E打开背包并尝试用鼠标左键单击前一种箭，你会发现你无法移动或者扔掉那组药水箭，除非你把射出去的那只箭捡起来。

When an enchanting bow with infinity is held and two kinds of arrows are in the bag, and the first kind of two arrows are tipped arrows, then shoot the arrow towards the ground and don't get to pick up it, press the E to open the bag and use the left mouse button to click on the first kind of arrows, there's a bug that you can't move or throw away the arrows until you get to pick up the arrow you have shot.
--Translated by a Chinese whose English is not good.