When trying to resize an existing note on Piano Roll, sometimes it moves the note instead of resizing. According to my experience, as I hover the right end of the note, the mouse cursor changes to resize. But if the mouse pointer is left to the right end, it still moves. If the mouse pointer is more to the right it resizes. Still, it's often wearysome to click exactly to the right side, especially when trying to resize a several notes. I think it would make more sense to resize whenever the mouse cursor show resize, even when it's a bit more to the left.