Hi, I'm making use of dynamic route segments in an app with the following structure

app/
├─ [...filters]/
│  ├─ page.tsx
├─ search/
│  ├─ page.tsx
├─ not-found.tsx
├─ page.tsx
├─ layout.tsx

The [...filters] segment makes use of generateStaticParams to generate a set list of routes, and sets dynamicParams to false so that the app will throw a 404 if a non-generated route is visited.

I wanted to customise the 404 behaviour, so I added a not-found.tsx file to the root of the app that will, depending on the path trying to be accessed, either redirect to the search segment, or show a custom 404 message.

This all works fine in dev mode, however when I build the app no .html files are generated for the routes produced by the [...filters] segment's generateStaticParams call.

If I remove the root not-found.tsx file, the .html files are generated for all expected routes.

Has anyone seen anything like this before? Have I misunderstood what the not-found.tsx root file is for? Thanks for any help.