chore(docs): clarify experimental network features (#15228)

* auth

* URL switch

* mobile app

* caps

* headers, app changes

* oxford comma

* Match case to other use in Immich

* add url

* asset download also causes issues

docs/docs/FAQ.mdx

@@ -53,10 +53,14 @@ On iOS (iPhone and iPad), the operating system determines if a particular app ca
 - Disable Background App Refresh for apps that don't need background tasks to run. This will reduce the competition for background task invocation for Immich.
 - Use the Immich app more often.
 
-### Why are features not working with a self-signed cert or mTLS?
+### Why are features in the mobile app not working with a self-signed certificate, Basic Auth, custom headers, or mutual TLS?
 
-Due to limitations in the upstream app/video library, using a self-signed TLS certificate or mutual TLS may break video playback or asset upload (both foreground and/or background).
-We recommend using a real SSL certificate from a free provider, for example [Let's Encrypt](https://letsencrypt.org/).
+These network features are experimental. They often do not work with video playback, asset upload or download, and other features.
+Many of these limitations are tracked in [#15230](https://github.com/immich-app/immich/issues/15230).
+Instead of these experimental features, we recommend using the URL switching feature, a VPN, or a [free trusted SSL certificate](https://letsencrypt.org/) for your domain.
+
+We are not actively developing these features and will not be able to provide support, but welcome contributions to improve them.
+Please discuss any large PRs with our dev team to ensure your time is not wasted.
 
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