Oops, sorry -- the lockup was resolved with bug#72721 (I had it down to a reproduction case using diff-hl, which adds fringe displays to highlight changed lines).

The "this one" involved lsp-dart, which adds guide-lines to show hierarchy.  I didn't have a minimal reproduction case yet, but it was using text-overlays to show the guidelines, which were mis-rendered when overlapping with the min-width etc properties added by visual-line-wrap-mode.  That was resolved with the same patch from bug#72721.

Apologies for the lack of context.

On Mon, Aug 26, 2024, at 4:50 AM, Jim Porter wrote:
> On 8/24/2024 10:55 PM, Eli Zaretskii wrote:
> >> Date: Sun, 25 Aug 2024 10:12:41 +1000
> >> From: "Mark Hepburn" <mark@markhepburn.com>
> >> Cc: "Eli Zaretskii" <eliz@gnu.org>
> >>
> >> As an added bonus, the patch from bug#72721 fixes this one too.
> > 
> > This one was supposed to be fixed already, by a different change.
> 
> Mark, by "this one", did you mean the dart-mode issue you'd mentioned?
> 
> On 8/18/2024 2:53 AM, Mark Hepburn wrote:
> > I'm getting rendering-lockups with dart-mode when I enable visual-wrap-prefix-mode.
> 
> If so, that's good news, and the lockup does indeed sound like bug#72721.
>