That's odd; it appears they are using a different cookie 'popup' depending on the browser/OS...?
I tested on Ubuntu and macOS with the latest Firefox (clean profile) and Chromium and i get the cookie popup/wall, even with ALL default uBO filter lists enabled, and also with the IDCAC list enabled in uBO. Screenshot: https://imgur.com/jcr4EuP
However i just tested with https://www.browserling.com/ which uses Windows 7/Internet Explorer 11 and here i do not see the 'cookie popup/wall' but instead i see a blue 'cookie banner' (which is easier to block with uBO.)