OnBeforeResourceLoad() not called for some fetch/XHRs

Describe the bug For certain site(s) the request handling is not working, because neither CefRequestContextHandler::GetResourceRequestHandler() nor OnBeforeResourceLoad() is called for some requests invoked by service worker.

To Reproduce Steps to reproduce the behavior:

implement the request handler in cefclient in the class ClientRequestContextHandler (root_window_manager.cc), for example

CefRefPtr<CefResourceRequestHandler> GetResourceRequestHandler(
      CefRefPtr<CefBrowser> browser,
      CefRefPtr<CefFrame> frame,
      CefRefPtr<CefRequest> request,
      bool is_navigation,
      bool is_download,
      const CefString& request_initiator,
      bool& disable_default_handling) override {

      std::string url = request->GetURL();
      if (url.find("fbs.com/api", 0) != std::string::npos)
      {
          LOG(INFO) << "**X: " << request->GetIdentifier() << " " << url;
      }

      return this;
  }

navigate or start with --url=https://fbs.com/cabinet/recovery
(optional) send form with any e-mail
no requests to fbs.com/api are caught

Expected behavior Requests like https://fbs.com/api/v1/maintenance should be handled.

Screenshots If applicable, add screenshots to help explain your problem.

Versions (please complete the following information):

OS: Windows 10
CEF Version: 117.2.5

Additional context I've tried to find the problem, I've got here: forum post

chromiumembedded / cef

OnBeforeResourceLoad() not called for some fetch/XHRs #3593