Switching monitors and auddio devices on a mac and pc causes a ton of these pop up boxes. Even when I select do not show again, I'm stuck having to close 10+ of these every time using Character Animator. I switch screens, audio devices (headphones to monitor) etc... a lot, so these add up.
Are you getting the correct number of pop up boxes(one per device switch), but your workflow(regular switching) means you encounter them a lot and the option to not show again doesn't work?