Thanks, that’s good to know.
In our case, we have some top-level categories used particularly for grouping of categories and not so much to be a category for posting.
So, instead of support and wordpress looking like separate entries. We want to communicate sort of that there’s one category of support: wordpress which clearly shows the nesting.
Q: what category is this?
A: the support: wordpress category (maybe spelled out: the wordpress category within support)
What we don’t like is the sense of “this is in the support category and the wordpress category”
So, maybe something like this:

or even just the option to completely hide the parent category when looking at a post?
Or maybe support: wordpress with the dual-colored box on the right of the text…?
The priority is to not give the parent so much separate emphasis on its own, avoid the impression of 2 categories.
Getting a sense of the range of possibilities will let us just play with things. Thanks for the help!