🇪🇸Spain @xavi-xaloc

@rubofvil I've tried the proposed patch but it doesn't work for us. We just found the opposite, that redirection works only when ob_start function is executed without callback function, as it is applied when debugging is enabled.
Anyway, when sending the form, the proposed condition is not matched:

+            if (!empty($_POST["hidden_processor"]) && $_POST["hidden_processor"] == "1") {
+                // Avoid executing ob_start allow the processor to continue
+            } 

So ob_start function with callback function is executed:

else {
+                ob_start(function () { return ''; });
+            }