I have a feeling this will appear more times throughout the app, can @ngkountas or @santhosh tell us why this is happening?
Is it like a default state for the component that then gets updated? if that's the case we should think about setting the default to a loading gif or something so that doesn't happen

Change 629631 had a related patch set uploaded (by Nik Gkountas; owner: Nik Gkountas):
[mediawiki/extensions/ContentTranslation@master] SXContentComparator: Fix present section banner to show only for present sections

https://gerrit.wikimedia.org/r/629631

In T263718#6490298, @Jpita wrote:

I have a feeling this will appear more times throughout the app, can @ngkountas or @santhosh tell us why this is happening?
Is it like a default state for the component that then gets updated? if that's the case we should think about setting the default to a loading gif or something so that doesn't happen

As @Jpita noticed this happens because application state is not (always) fully loaded as soon as user reaches "Compare contents step". However, there is no need to change implementation for the rest of the application or its state, as this can be easily be fixed by adding a few more checks before showing "present section" banner. Done in related patch.

Change 629631 merged by jenkins-bot:
[mediawiki/extensions/ContentTranslation@master] SXContentComparator: Fix present section banner to show only for present sections

https://gerrit.wikimedia.org/r/629631