I've looked around and haven't seen anything talking about this. I read through the patch notes, and couldn't find a answer for this. I noticed right around 2.1 or maybe a patch later, that when you are mining/gathering you now have sort of a way to queue your mining when your clicking on the item you want. This wasn't there before 2.1. If you click before you hit, sometimes if you click twice, or something. Or rather if you click once or twice in between hits, it will sometimes queue up your next hit, making it hit automatically at the next opportunity. This is kind of like on a DoW/DoM, where if you click on a ability a second or 2 before the cool down is up, it will do that move for you as soon as it is ready. This seems like a really awesome feature, to help you make sure your mining as fast as possible, however it seems to be broken, unless I'm doing it wrong somehow. I know if people have turbo controllers it doesn't matter either way. But was just trying to figure this out.