It happens to me sometimes - I'm working in Procreate or CSP and the Pencil registers a double tap although I didn't actually tap it twice - and changes the tool. I do move it around in my hand slightly and often adjust my hold so this could be it - but then again, when I actually try to recreate this (activating the gesture just by wiggling the Pencil in my hand and not actually double-tapping) it never happens unless I intentionally tap it twice. It almost seems random. Otherwise it works great. It doesn't happen often, but it is a bit annoying. I've heard Rene Ritchie mention in his podcast how he sometimes accidentaly activates the tool change on the new Pencil in Procreate - so I'm guessing this happens. Anyone else have this issue?