@cdevroe @timapple @manton I've done this with Today I Learned (the "Tips" and "Guides" buttons).
I think mine is flashing too. When I look it appears that the site is first jumping to a URL without the
categories part of the URL before redirecting. That's odd since I've only ever used the full URL for that page and haven't changed anything else, as far as I know.
I am using a custom theme (Primrose as the base) with Hugo 0.54.