Description of the issue: slashdot.org shows an ad that is not blocked
Exact URL of the website in question: https://m.slashdot.org/
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
Does the ad appear when using a Private window as well? yes
What OS are you using when you see the ad? Android
Brave version (check About Brave):Brave - Nightly 1.92.42, Chromium 148.0.7778.96
It seems that adding the following to custom filters fixes the issue:

