Possible edge/custom-domain asset delivery issue

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1

Hi, I have a Next.js site on Vercel.

The exact same production deployment works correctly on:

But on my custom domain:

images fail to load or load extremely slowly on all devices and networks.

HTML/CSS render, but image assets from /public are the problem.
Example failing asset:

https://whipslick.ru/hero/hero-1.webp

One affected request returned partial content with this request id:
x-vercel-id: arn1::lfcn2-1776392471600-e88480e18f5b

DNS is configured and verified in Vercel. The issue happens only on the custom domain, not on the .vercel.app domain, using the same production build.

Could you check whether this is an edge/custom-domain asset delivery issue?

2

The domain troubleshooting guide can help with most custom domain configuration issues. You might be able to use that guide to solve it before a human is available to help you. Then you can come back here and share the answer for bonus points.

You can also use v0 to narrow down the possibilities.