> On Sep 27, 2021, at 12:07, Alan Third <alan@idiocy.org> wrote:
> 
> I've pushed a small change to master that *may* fix this, although I
> doubt it, and adds a pile of logging if it detects the situation that
> I suspect is causing this.
> 
> If you run from the terminal it will print the logging to it,
> otherwise it'll appear in the system log, so if you see the glitch
> please check the logs to see if there's anything in there.
> 
> Thanks!
> -- 
> Alan Third

The glitch just happened again after a long time. I’m not sure whether
the logging is still in code, but I couldn’t find any relevant messages
in the system log (http://sprunge.us/heJzLM) except for this line:

  Oct 25 21:16:30 mbp-2018 com.apple.xpc.launchd[1]: Coalition Cache Hit: app<application.org.gnu.Emacs.12664035.12664040(501)> [1660]

Screenshot attached. I just switched from another buffer as it happened.

In GNU Emacs 28.0.60 (build 2, x86_64-apple-darwin20.6.0, NS appkit-2022.60 Version 11.6 (Build 20G165))
 of 2021-10-20 built on mbp-2018.local
Repository revision: 4540130312b8e9dbbe930ba2ffb32e5e51560514
Repository branch: emacs-28
Windowing system distributor 'Apple', version 10.3.2022
System Description:  macOS 11.6

Configured using:
 'configure --with-native-compilation --disable-ns-self-contained
 --prefix=/Users/iostapyshyn/.local 'CFLAGS=-O2 -march=native
 -fomit-frame-pointer''