Removing power cable causes lag
Using a Dell Latitude E7250 with Debian Sid/unstable with Linux 5.7-rc5 (but also before) and GNOME Shell 3.36.3 (also before) with Wayland, unplugging the power cord, causes the system to lag for some seconds. Best seen with playing a video in a browser. Firefox 77.0 and YouTube in my case.
Edited by Andre Klapper