I'm seeing a weird behavior that I don't think I've seen before. My guess is it's a macOS problem but it's screwing up several of my KM macros. It's happened with both Things and Spotify—at different times they have both seemed to be half-running and half-not-running. In both cases:
— The application appears in the Dock (where I don't have it by default) with a dot next to it (usually the sign of a running application.
— The application doesn't appear in the system app switcher (the one built-in to macOS, which appears when I press Command-Tab).
— KM thinks the application is running, inasmuch as an "application is running" condition returns true.
With Things I also notice a strange behavior sometimes: Icon is in the Dock, marked as running, but when I click it, it takes like 5 to 10 seconds until the window appears – or it crashes in the process.
I think (not absolutely sure at the moment) that this happens only after Things
was not frontmost for a long time (sometimes I prefer not to see my ToDo list )
has been automatically launched at system reboot, because it was open before reboot.
I will pay more attention the next time it happens, especially if it disappears from the app switcher.
I have seen a few apps, notable 1Password, which instead of quitting converts itself from a foreground application to a background-only application.
So the application is still running, but is no longer a foreground application, so it does not show up in the Application Switcher, but is still technically a running application.
I don't know if Spotify and/or Things do the same sort of thing, but it would not surprise me.