- Fixed port redirection for URL behind proxy

src/Extension/UrlExtension.php

@@ -195,7 +195,12 @@ PATTERN;
 
     protected function domain() : string
     {
-        $port = $this->isDefaultPort() ? "" : ":" . $_SERVER['SERVER_PORT'];
+         if ( ! empty($_SERVER['HTTP_X_FORWARDED_PROTO']) || ! empty($_SERVER['HTTP_X_FORWARDED_SSL']) ) {
+            $port = "";
+        }
+        else {
+            $port = $this->isDefaultPort() ? "" : ":" . $_SERVER['SERVER_PORT'];
+        }
 
         return strtolower($this->appUrl ? $this->appUrl . $port : $_SERVER['HTTP_HOST']);
     }