bug#47937: 27.1; Invisible text property updated only for a portion of buffer

[Eli Zaretskii]

> Date: Wed, 21 Apr 2021 22:02:02 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 47937@debbugs.gnu.org
> 
> > From: Arthur Miller <arthur.miller@live.com>
> > Cc: 47937@debbugs.gnu.org
> > Date: Wed, 21 Apr 2021 20:40:31 +0200
> > 
> > > They are not processed because there's no invisible property there.
> > 
> > Why does it work on visible portion of the buffer, but not on the rest?
> 
> Because you have font-lock-mode turned on.  And JIT font-lock begins
> by wiping out all the text properties.

I should clarify this, I guess: this is specific to Org buffers, see
org-unfontify-region.  And "all text properties" is an exaggeration:
it removes many properties, but not all of them.