WKWebView does not start loading a POST formSubmitted action

Hi, I am experiencing an issue with WKWebView. I can see it starts loading both POST and GET requests. However, I noticed that they are processed only if navigation action is other (-1). Nevertheless, ig navigationType is formSubmittee (1), startLoading method is never called, although I can see the action request on decidePolicy method.

Maybe I should set any preferences or configuration. Or maybe it is a limitation of WebKit.

Can you please help me?