Quick Index has trouble with to much headlines?

Hello!
Since the last update (or one before that ...), an index is no longer created if the page has too many headings. I can't name the exact number above which the problem occurs, but this is the second time I've encountered it. For example here: www.blueprints.de/zitate/tipps-grosser-denker/
Or is it something else?
Best regards
Peter

The memory limit is on the maximum: 512 MB.

Ok, I hope, that works:

I get error 500 with 8.2 or 8.3 - both on admin and on the live page ...

Hello Peter,
now the site is on PHP 8.3 and Joomla 5 and the error is still there. For example:
www.bauen-und-heimwerken.de/hausbau/heiz...-was-braucht-man.htm
and
www.blueprints.de/zitate/tipps-grosser-denker/
What could we do?
Kind regards
Peter

Hmmh - there is no error messages. And the site is not broken. Only {index} is not working. But maybe I'm missing something.

Hello Peter,
What are you talking about? There is no 500 error, the page runs normally. Only {index} does nothing... Or are we talking at cross purposes?
In other words: Why is there no table of contents on this page?

Hello Peter,
the problems with PHP 8.3 have been fixed, there were problems with the PHP settings at the hoster. These have been corrected - now there are no more problems. Joomla is also up to date. Everything works, except Quick-Index on some pages.
Ok, the pages are long, but that makes sense for some topics. We don't want to split this up over several pages, because in the past there have always been problems with URL conversions when Joomla versions were changed. I also don't think the content is sooooo long - some Wikipedia articles are longer. We also have longer content.
It's a shame that there's no clue as to why Quick-Index doesn't do anything here and that we have no indication as to why this is the case. If it were the number of headings, for example, then you could remove some of them ... But you don't see any possibilities to find the cause, right?
With kind regards
Peter

Translated with DeepL.com (free version)

As I have mentioned numerous times now .... in German this is called ‘Schweinchen-Schlau-Aussage’. It stands for not communicating in a very respectful way, also for arrogance.
Because I think you didn't express yourself so clearly, you first blamed it primarily on problems in PHP and then assumed (!) that it was due to too much HTML.
Presumably (....) this assumption of yours is even wrong, because for example www.bauen-und-heimwerken.de/baustoffe/daemmstoffe.htm has significantly more words, significantly more HTML and Quick-Index runs without any problems. So it must be something else.
But the whole thing is not that important as it only affects very few pages. So please don't bother any further. It was just important to me to give you some feedback. You can of course do what you like with it 🙂
All the best to you
Peter