I have a similar Plasma 6.3 issue. I use a software KVM to control my work laptop. Now I get a pop-up notification when my controls are being captured and sent to the other computer. Yeah, I know I’m doing that, it’s deliberate. I’ve been using a software KVM for 8 years. No way to turn it off that I can find that doesn’t also turn off all pop-up notifications.
I have a similar Plasma 6.3 issue. I use a software KVM to control my work laptop. Now I get a pop-up notification when my controls are being captured and sent to the other computer. Yeah, I know I’m doing that, it’s deliberate. I’ve been using a software KVM for 8 years. No way to turn it off that I can find that doesn’t also turn off all pop-up notifications.