Your AAAA record on tvmaze.com returns 2a03:4000:27:73b:d4ee:11ff:fe67:de01, responds to ping, but times out returning a website. I'm using a HE tunnel. I had to disable the AAAA record to just return the A record in order to access your site.
Hrm, that's weird, I tried from a couple of different ISP's and they all work fine.
F.e.:
$ curl -6 -vvv https://www.tvmaze.com
* Trying 2a03:4000:27:73b:d4ee:11ff:fe67:de01:443...
* TCP_NODELAY set
* Connected to www.tvmaze.com (2a03:4000:27:73b:d4ee:11ff:fe67:de01) port 443 (#0)
Can you show the output from a curl command like this?