For the last few months, every now and then my foreground window will “blip” out of focus momentarily. This is slightly annoying whenever it happens, since that means that whatever I was doing gets disrupted. If I’m drawing a line, the line gets hecked up. If I’m typing text, letters get dropped. If I’m recording in Logic, my audio drops out for a couple seconds. You know, annoying.
I was searching high and low for what it might be, and in doing so I noticed that Karabiner-Elements (which I use to remap some of the keys on my non-remappable keyboards) has a window focus log (from the Karabiner menu choose
Event Viewer then
Frontmost application), which is intended to make it easier to tell the bundle name for per-app layout overrides.
Well, this is handy!