subdomain not validating public paths?

[tpalaz]

I'm encountering a strange error when trying to load images from a subdomain.

I have followed the exact steps in the repo for middleware, with my own components and pages.

When the server tries to GET an image, it responds with 404 that the image cannot be found.

Request URL: https://app.xxxxxxxxxx.com/favicon.ico
Request Method: GET
Status Code: 404 

Where as on the main domain:

https://xxxxxxxxxx.com/favicon.ico

Resolves without any issues what so ever.

What am I missing here?

[tpalaz]

Managed to figure this out after a lot of head sratching. Running into :
vercel/next.js#36563

👍 incase anyone needs it, it's related to i18n