YouTube Thumbnail Ads not blocked

Description of the issue:
I’ve noticed YouTube putting ads in the list of videos it recommends for me. It’s always the very first video. I’d normally just ignore it, but it’s designed to imitate an actual video thumbnail. For me, it feels deceptive. Sometimes the Ad will be blank as if Adblock blocked it. But it usually appears when the page loads.

Exact URL of the website in question:
It’s YouTube…

Screenshot of the ad as it appears in Brave

Did the issue present with [default Shields settings]
(yes)

Does the site function as expected when Shields are turned off?
Yes

Brave version (check About Brave):
Version 1.14.84 Chromium: 85.0.4183.121 (Official Build) (64-bit)

Hi, it should be blocked. (Would test in the latest Brave build, Version 1.15.72 or better)

Related report: https://github.com/brave/brave-browser/issues/11955

I have been using Brave on my home PC for 2+ months and love it, so i decided to install it on my work PC (both are running the same version Version 1.15.75 Chromium: 86.0.4240.99 64-bit).

On my home PC from day 1 ads have been blocked on YouTube, however on my work PC they are not. I tried changing Trackers and Ads to blocked to aggressive with no change.

Is there something else i can check or change?