Subdomains that don't have a forum will 404 when trying to go to a forum thread

[meharryp]

Interestingly the shop and profile pages work fine
Places where this happens:
Post search
The alerts box

Subdomains this can happen on
https://wwww.facepunch.com
https://beep.facepunch.com/
https://chunks.facepunch.com/
you get the point