Can't create a topic in "Travis Discussions and feedback"

In https://travis-ci.community/c/product, the “New topic” button is greyed out, and I can’t select it as a category in the new topic form, only the “feature requests” subcategory.

Since @BanzaiMan has just moved my recent topic there, this category seems to be supposed to be usable on its own.

Has been fixed for some time now.