DNS blocking fails regularly when dns request are done several times. I think it happens on several domains (also on Android) but here I can only show on Windows 10 for "mydealz.de" that requests "faye.prod-eks.pepper.com" (some kind of tracking). As you can see it is requested every few seconds, most of the requests are blocked, but it seems that every 4th request is answered from the cache and returns a domain. But I am not totally sure that the requests succeed, because in the network tab of the dev tools of vivaldi, all the requests seem to fail.
Issue URL (Ads)
https://www.mydealz.de
Comment
[NSFW] Screenshots
Screenshot 1
[Screenshot 1](https://cdn.adguard.info/sitereports/4hlrcy23v6ass0cwswgwwokgcww4s44he4fc2wk1bk.jpg?nc=1)System configuration
Block Location API,
Strip URLs from tracking parameters,
Hide your search queries,
Send Do-Not-Track header,
Remove X-Client-Data header from HTTP requests,
Block trackers,
Disable Windows Telemetry,
Turn off Advertising ID
Cloudflare
,DNS
filters:
||faye.prod-eks.pepper.com^
AdGuard Base
Privacy:
AdGuard Tracking Protection,
AdGuard URL Tracking,
EasyPrivacy,
Fanboy's Enhanced Tracking List,
Peter Lowe's Blocklist,
Fanboy's Anti-Facebook List,
Fanboy's Anti-thirdparty Fonts
Social Widgets:
AdGuard Social Media,
Fanboy's Social Blocking List
Annoyances:
AdGuard Annoyances,
Adblock Warning Removal List,
Fanboy's Annoyances
Security:
Online Malicious URL Blocklist,
NoCoin Filter List
Extra
Popup Blocker
Web of trust