Many years ago I used Cloudflare, and more than once I had issues with them blocking websites I wanted to access.
I absolutely despise that. I want my DNS to resolve domain names, nothing else.
For blocking things I have Pi-Hole, which is under my control for that reason. I can blacklist or whitelist addresses to my needs, not to the whims of a corporation that wants to play gatekeeper to what I can browse.
1.1.1.2 and .3 are explicitly offered with filtered responses.
Switching to literally any other DNS and the same domains resolve instantly.
Could be a issue specific to my location or devices, but its been consistent enough that I stopped bothering.
Just as a side note: Something I have done with this in the past as a fun experiment was to set up an Unbound DoT server on assorted VPS nodes in assorted locations around the country, run this script and configure each Unbound to use the 5 to 10 fastest servers on each node and cache results longer. Then I used Tinc (open source VPN) to connect to these VPS nodes from my home's Unbound and distribute the requests among all of them. I save query logs from all of them and use cron to look up all my queries hourly to keep the cache fresh and mess up any analytic patterns for my queries. Just a fun experiment. 99.99% of the time I just query the root DNS servers for what NS servers are authoritative for a given domain or what I call bare-backing the internet.
