Fix suffix normalization

start.sh

@@ -110,13 +110,13 @@ FAMILY_HOST="$(resolve_http_hostname "FAMILY_DOMAIN" "family.${APP_FQDN}")"
 
 normalize_host() {
   local host="$1"
-  # Replace trailing shared domain with the app domain if present (allows values like cast.ente)
+  local suffix=".${APP_FQDN#*.}"
   case "$host" in
-    *".${APP_FQDN#*.}")
-      printf '%s\n' "${host%.*}.${APP_FQDN#*.}"
+    *"$suffix")
+      printf '%s\n' "$host"
       ;;
     *)
-      printf '%s\n' "$host"
+      printf '%s%s\n' "$host" "$suffix"
       ;;
   esac
 }