On the german village pump we had the problem, that no edit section links was shown for a h1 header. With try and error by reduce the wikitext, I came to the following wikitext, which was break the preprocessor:

{{
|
= h1 =

The h1 was rendered as a header, but without edit links.

I fixed this by nowiki the {{, because a local bot has also problems with that.

On this diff the left side is the wikitext with the problem and the right side works:

https://de.wikipedia.org/w/index.php?title=Wikipedia:Fragen_zur_Wikipedia&diff=127176161&oldid=127175951

The {{ and | are spanned over two sections. The h1 is labeled "3. Februar 2014"

Version: 1.23.0
Severity: normal