If the one report on Windows is verifiable, that would help, wouldn’t it?
These links might help with polls, if it’d be useful to get a sense of how widespread the phenomenon is, and who’s experiencing it:
https://www.phpbb.com/community/viewtopic.php?f=46&t=1025395
Maybe even ask explicitly to see if it’s only one or two of us; and the rest - for whatever reason - never get it. Or, if they do, do the switch modes routine that Daniel has advised and move on.
Thanks in any case for working so hard - at this, as with everything!