Submitted 2 days ago by 
neutrinodisaster@forum.vivaldi.net to vivaldi-for-ios@forum.vivaldi.net
https://forum.vivaldi.net/topic/122352/since-adblocker-update-adblocker-is-not-working-on-ios
I have the exact same filters on iOS as on my desktop (running Windows), but this is the difference:
jane.n@forum.vivaldi.net 1 day ago Ads are blocked on that website with the default levels and blocker lists. Have you added any custom lists? Try disabling them to see, if that helps.
neutrinodisaster@forum.vivaldi.net 1 day ago @jane.n Thank you for the advice, removing the custom lists did work. Do you know why that's the case? I could see why custom lists may be redundant, but how could they worsen the quality? Should I remove potentially unnecessary filter lists for my desktop for that reason? I've been having them so I don't take any chances on privacy.
For me all ads are blocked on that page. It's probably a settings issue of some kind.
I have my ad blocker on Aggressive mode.