Hi, I have the same issue for maybe two months now.
The problem occurs in two cases: 1) If I use the computer again after suspend. 2) If I just disable the screen by the power button without suspending the computer. Of course, I have configured my power saving settings accordingly. I use additional to Debian (stable version) openSUSE Tumbleweed with the most recent packages, so with the latest state of development. I don't have the issue with it, although I use the same user data. I'm able to solve the problem by running "systemctl --user restart plasma-kglobalaccel.service", which works until the next time I bring the computer back from suspend mode or until the next time I press the power off button to turn off the screen. Feel free to ask for additional information. Regards, Kai