In T328452 we apparently fixed this with the "Read as wiki page" button, but not with this one.

Change 958065 had a related patch set uploaded (by Bartosz Dziewoński; author: Bartosz Dziewoński):

[mediawiki/extensions/DiscussionTools@master] Fix interaction of "Add topic" button with categories

https://gerrit.wikimedia.org/r/958065

Test cases to verify:

1. Discussion page with categories, displaying both "Add topic" and "Read as wiki page" buttons – buttons shouldn't overlap categories
   • https://en.m.wikipedia.org/wiki/Talk:Doctor_Who (most talk pages should behave this way)
2. Discussion page with categories, displaying only the "Add topic" button – button shouldn't overlap categories
   • https://en.m.wikipedia.org/wiki/Wikipedia:Administrators'_noticeboard/Incidents (most discussion pages in the project namespace should behave this way)
3. Discussion page with categories, displaying only the "Read as wiki page" button – button shouldn't overlap categories
   • https://en.m.wikipedia.org/wiki/Talk:COVID-19_pandemic/Current_consensus (a talk page where the option to add new sections is discouraged using __NONEWSECTIONLINK__)
4. Discussion page with categories, displaying only the "Read as wiki page" button, because it's showing the talk page empty state instead of "Add topic" button – button shouldn't overlap categories
   • https://en.m.wikipedia.org/wiki/Talk:Kerry_Young
5. Discussion page without categories, displaying any of the buttons – button(s) should touch, but not overlap, the "Last edited…" bar
   • https://pl.m.wikipedia.org/wiki/Dyskusja:Rodzinna_dysautonomia (it might be difficult to find one on en.wp since they all have the templates, so here's an example from another wiki)

Change 958065 merged by jenkins-bot:

[mediawiki/extensions/DiscussionTools@master] Fix interaction of "Add topic" button with categories

https://gerrit.wikimedia.org/r/958065