@janbb, I think maybe it is, because whenever I list ‘covid-19’ among my topics, it gets changed automatically to ‘COVID-19’. That happens when it defaults to a topic that’s already there. Either someone got there first with that spelling or someone with tag-editing powers changed it.
That’s annoyingly true for various other topics as well: for instance, when I spell a term in lowercase because it’s a common noun, and it shows up with an initial cap because it’s already present in that form. Can’t override it. So it sticks me with an error or inconsistency that I didn’t commit.