They block the whole of Cloudflare R2, I believe the Docker hub is just (heh) a collateral.

When the La Liga match starts, everything that's proxied via CF (including zero access reverse tunnels) stops working.

There's even a website made for checking if the match is on: https://hayahora.futbol/

You can check if your host is affected: https://hayahora.futbol/#comprobador&domain=docker-images-pr...