I think there's an issue with IPv6 resolution, but I do think it's a Cloudflare issue, as they're the ones who insert that IPv6 hostname I can't resolve. This doesn't happen with any of my other sites, though, it's odd.

If it works tomorrow you know why.

They block random Cloudfare IPs related with sport streaming sites.

Are you in Spain? I've seen it in Greece, but only on one of my devices.

I am not in Spain. But I am Spanish. I think it gets blocked in Spain and in Italy.