Judging by these symptoms it is a hardware problem, as Eduardo suggested earlier.Hi! I have massive problems with my Logitech M705 - Or specifically with the left mouse button. Sometimes (very often) singleclick becomes double-click, dragging items is very hard, it drops the drag before I release the mouse button. Clicking on the terminal icon in my xfce panel often starts three terminals. The weird thing is that mouse movement and the mousewheel works just fine. No problems there of any kind.
-- With kindest regards, Alexander. ⢀⣴⠾⠻⢶⣦⠀ ⣾⠁⢠⠒⠀⣿⡁ Debian - The universal operating system ⢿⡄⠘⠷⠚⠋⠀ https://www.debian.org ⠈⠳⣄⠀⠀⠀⠀