Lining items up in columns is only an advantage if there is a small variance in the width of page labels. This is not always the case. And the examples given to convince us are all fully validated. Consider this example:

In T211006#4969429, @CKoerner_WMF wrote:

The feedback is appreciate, but I think there's a little confusion. This task is about adding a feature to search results on mobile to be more like desktop.

This might make sense on projects like Wikipedia, Wiktionary, or Wikiquote, but does not make sense for Wikisource.

We're getting this problem in the Page namespace sometimes: https://en.wikisource.org/wiki/Page:The_grammar_of_Dionysios_Thrax.djvu/9 but when this page is transcluded, the problem disappears.

In T209939#4843264, @Ankry wrote:

As we have already found a workaround, the delay does not seem to be a problem.