Hello.

I have a Vercel Hobby project called Capsule2007.

The deployment itself works perfectly: https://capsule2007.vercel.app

However, the custom .ru domain: https://www.capsule2007.ru

randomly stalls for 10--15 seconds.

Important observations:

• .vercel.app domain is always fast;

• custom .ru domain alternates between instant loads and 10--15 second hangs;

• issue is reproducible many times per day;

• DNS and SSL were verified;

• Cloudflare proxy was disabled and re-enabled during testing;

• Vercel agent already confirmed:

  • DNS is correct;

  • SSL is correct;

  • traffic reaches Vercel edge;

  • no deployment/runtime issues detected.

We also ran the Vercel debug script during the issue, and it failed with: "Range lookup failed - No response from API"

This seems related to edge routing/network path instability specifically affecting the custom .ru domain.

Region: Russia / Europe routing path.

Could someone from the infrastructure/network team check:

• edge routing;

• TLS negotiation path;

• regional routing;

• or possible instability affecting .ru custom domains?

Thank you.