TypeError: invalid media type

Describe the bug

I am receiving the following error when receiving a specific request from this service (https://sparkles.sploot.com) to a function running with netlify dev

Netlify crashes before any of my code runs, so I cannot see what the request that causes this looks like.

TypeError: invalid media type
    at Object.parse (/home/mpardalos/Documents/mpardalos.com/node_modules/netlify-cli/node_mod
ules/content-type/index.js:126:11)
    at serveRedirect (file:///home/mpardalos/Documents/mpardalos.com/node_modules/netlify-cli/
dist/utils/proxy.js:323:62)

  System:
    OS: Linux 6.13 Fedora Linux 41 (KDE Plasma)
    CPU: (8) x64 11th Gen Intel(R) Core(TM) i5-1145G7 @ 2.60GHz
  Binaries:
    Node: 22.14.0 - /usr/bin/node
    npm: 10.9.2 - /usr/bin/npm
  npmGlobalPackages:
    netlify-cli: 19.0.2

Steps to reproduce

Reproducing requires being able to use https://sparkles.sploot.com/login, which requires a site set up for indieauth and micropub. If required, I can try to provide an example with my code.

Configuration

[build]
publish = "public"
command = "hugo --minify"

[build.environment]
HUGO_VERSION = "0.111.3"

[context.deploy-preview]
command = "hugo --minify --buildFuture -b $DEPLOY_PRIME_URL"

[[redirects]]
from = "/micropub"
to = "/.netlify/functions/micropub"
status = 200

[dev]
framework = "hugo"

Environment

System:
OS: Linux 6.13 Fedora Linux 41 (KDE Plasma)
CPU: (8) x64 11th Gen Intel(R) Core(TM) i5-1145G7 @ 2.60GHz
Memory: 6.94 GB / 15.34 GB
Container: Yes
Shell: 5.2.32 - /bin/bash
Binaries:
Node: 22.14.0 - /usr/bin/node
npm: 10.9.2 - /usr/bin/npm
npmPackages:
netlify-cli: ^18.1.0 => 18.1.0
npmGlobalPackages:
netlify-cli: 19.0.2

Start at the serveRedirect entry point in dist/utils/proxy.js and inspect how the content-type parser in content-type/index.js handles the request received from sparkles.sploot.com. Reproduce through netlify dev if possible, then establish expected handling for the invalid media type and verify that the CLI no longer crashes before the function runs.