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

[Eli Zaretskii]

> From: Arthur Miller <arthur.miller@live.com>
> Date: Wed, 21 Apr 2021 20:14:04 +0200
> 
> load and eval attached file: ob-hide-markers.el
> 
> open attached test.org file and switch to it's buffer.
> 
> M-x org-babel-hide-markers-mode
> 
> Expected all babel source block markers should be hidden, in entire
> buffer. 
> 
> For me, when scrolled down, after few screen pages, for me after ~ 3½
> screen pages, block markers are for some reason not processed.

They are not processed because there's no invisible property there.
So something is wrong here with the code that puts that property on
the text you want to conceal.

IOW, this problem has nothing to do with display or the invisible
property itself.