Upon conducting an edit which, incidentally, significantly reduced the page where the initial malfunction arose, the issue was resolved. However, if a request is made for an older version of said page, the API response remains unchanged and the issue persists. This may suggest that such API behavior occurs in cases of very long pages with a large number of sections. The link currently causing the malfunction is provided below:

@Volker_E Ok, thank you. It is only my personal opinion. It is very good
that upgrades are made to help people with difficulties, I appreciate that,
but for me these icons are just some kind of habit, that is why I want to
keep them in my wikipedia skin :)

I think the solution shown in the picture F34904681 is a good one. Are these symbols available on commons somewhere? I would like to know this because if they are removed (some are already removed on my wiki) I will change them in my private CSS.

@Aklapper here you are