Disclaimer: It is not a problem, just inconvenience.
I have main monitor and a tv both on HDMI. TV is swiched off most of the time. Every time I turn it on I shoud go to settings and enable it in “Display and Monitor” section. Workarounds which worked for me:
I’m running without kscreen2 for months now without any issue. I had a similar issue with 2 monitors connected with DP and HDMI. Turning on and off the HDMI monitor was always “re-arranging” my Desktop…
The time I need to spend updating my config is in no relation to kscreen2 doing it for me on a daily base