There is no function to left clicking a companion, but when you do, it still registers you as doing so, thus wasting the action and causing you to have to click again to attack / do whatever you want. The main problem with this is when you’re fighting with your companion, as they’ll often overlap mobs and get in the way of you clicking a mob.
A proposed fix to this is to just cause them to have no “left click action”, and thus have all left clicks go through them.
