Mac OS Catalina 10.15.5, Keyboard Maestro 8.2.4 on a MacBook Pro with external keyboard and mouse.
My system hung up yesterday with the application switcher open. I could toggle through the open applications but could not switch to any of them. I tried switching using my external keyboard and clicking with my mouse, and also turned those off and tried using the MacBook keyboard and touch pad but could not resolve.
I finally had to do a hard restart, and when my system came back up the Cmd-Tab hot key was not working for the KM Application Switcher; it only triggered the Mac OS feature. I did some more troubleshooting today including a complete uninstall/reinstall of KM and downgrading to an earlier version of KM but nothing worked. I finally changed the hot key to Opt-Cmd-Tab and was able to see the KM Application Switcher. Changing back to Cmd-Tab disables the KM Application Switcher again and takes me back to the Mac OS switcher.
Any suggestion for getting it working correctly again?