that green screen effect is from the really good sci-fi TV show Counterpart. I highly recommend it.
I can confirm that my ISP doesn't block it.
When I use AdGuard's DNS 94.140.14.14, 94.140.15.15 (or any DNS address for that matter) I can access e-services.clalit.co.il and also saas.attenix.co.il which is getting blocked when using Unbound.
The moment I use 127.0.0.1#5335 in Pihole's DNS settings, I get these issues. When I change to any other DNS, there is no issue. So clearly, not my ISP.
This is something in the Raspberry Pi's setting somewhere when Unbound is being used...
I wonder if my previous (last year) attempt to compile unbound 1.13.0 caused an issue.
Just for reference here's the guide I wrote to myself to compile it: pihole-blocklist/unbound/compile unbound.md at main · Gil80/pihole-blocklist (github.com)