Please don't be so dismissive of my issue. The problem lies within the REHub theme template files.
The theme is "REHub 188.8.131.52" with "Dokan 2.8.5" (free) and "Dokan Pro 2.8.3" (purchased) and "WooCommerce 3.4.5" -- all of which are the latest available.
Note: The problem only exists with "REHub 184.108.40.206". Prior to that, I had "REHub 220.127.116.11" and it was fine. If I reinstall "18.104.22.168" it's fine, but I shouldn't have to downgrade a theme for compatibility with the plugins its specifically designed to work with.
Also, the problem goes away if I disable "Dokan", but of course, the problem lies within the themes templates -- and it's meant to be a Dokan compatible theme.
I should also point out that there's no problem if I apply a different theme altogether.