generating API files with (coffee|css|html|js|md) at end of Application ID breaks site generation

e.g. /assets/fdroid-screenshot-en.png

$ curl -v https://f-droid.org/assets/fdroid-screenshot-en.png
[...]
* Server certificate:
*  subject: CN=f-droid.org
*  start date: Sep 10 00:00:00 2020 GMT
*  expire date: Oct 12 00:00:00 2021 GMT
*  subjectAltName: host "f-droid.org" matched cert's "f-droid.org"
*  issuer: C=GB; ST=Greater Manchester; L=Salford; O=Sectigo Limited; CN=Sectigo RSA Domain Validation Secure Server CA
*  SSL certificate verify ok.
> GET /assets/fdroid-screenshot-en.png HTTP/1.1
> Host: f-droid.org
> User-Agent: curl/7.64.0
> Accept: */*
> 
< HTTP/1.1 404 Not Found
< Date: Fri, 13 Nov 2020 13:12:35 GMT
< Server: Apache
< Content-Location: 404.html.en
[...]
< Content-Type: text/html
< Content-Language: en
< Via: 1.1 f-droid.org (Apache/2.4.25)
[...]