Hi, I'm encountering an issue with my Next.js application on railway when sending requests with a larger payload (around 50KB for a base64 image). The first request goes through successfully, but all subsequent requests (even with smaller payloads) remain pending. This only happens when I use a custom domain that I have configured on railway.

With the custom domain, the first request shows a successful response, but after that, no further requests are processed. The response shows 'server: railway-edge'. The other unsuccessful requests do not show up in any logs as far as I can tell.

However, this problem does not occur when I use a railway-generated domain, where all requests, including larger payloads, are processed without issues. The responses on the railway-generated domain also show 'server: railway'. Additionally, this blocking behavior only affects larger payloads, as smaller payload requests always work perfectly even on my custom domains. This also never happens when testing locally.

I would appreciate any help!