diff --git a/docs/troubleshooting.md b/docs/troubleshooting.md
index 3d090306..7cdd4cda 100644
--- a/docs/troubleshooting.md
+++ b/docs/troubleshooting.md
@@ -129,3 +129,15 @@ keyboard.
 
 ## iOS app
 Sorry, there is no way to debug or get the logs from the iOS app (yet), outside of running the app in Xcode.
+
+## Other
+
+### "Reconnecting..." / Late notifications on mobile (self-hosted)
+
+If all of your topics are showing as "Reconnecting" and notifications are taking a long time (30+ minutes) to come in, or if you're only getting new pushes with a manual refresh, double-check your configuration:
+
+* If ntfy is behind a reverse proxy (such as Nginx):
+  * Make sure `behind_proxy` is enabled in ntfy's config.
+  * Make sure WebSockets are enabled in the reverse proxy config.
+* Make sure you have granted permission to access all of your topics, either to a logged-in user account or to `everyone`. All subscribed topics are joined into a single WebSocket/JSON request, so a single topic that receives `403 Forbidden` will prevent the entire request from going through.
+  * In particular, double-check that `everyone` has permission to write to `up*` and your user has permission to read `up*` if you are using UnifiedPush.