Having a mouse button being over-sensitive or being used to another middle clic behavior like windows’ autoscroll toggle will tend to do that.
Having a fullscreen software using MMB for something else like panning and failling to fully capture the mouse on the current screen in a multi-monitor setup also.
HOW? In what manner of mouse using are you accidently clicking the paste button?
Having a mouse button being over-sensitive or being used to another middle clic behavior like windows’ autoscroll toggle will tend to do that. Having a fullscreen software using MMB for something else like panning and failling to fully capture the mouse on the current screen in a multi-monitor setup also.
Two finger scroll on my touchpad and another finger lightly presses it turning it into a middle click paste
That’s interesting. It never does that with my touchpad. I wish it did though.
What desktop environment?