SharePoint Online Webparts Not Loading Correctly Until Page Refresh

Hey Scrum5,

I ultimately had to get into the Type/Javascript level on this to get it to work (window, etc).  Managed to nail it down by adding this to my Init code in the SPFX web-part.  Hope it helps you!  

*****

  protected async onInit(): Promise<void> {

    await super.onInit();

    navterm = window.location.pathname.substring(window.location.pathname.lastIndexOf('/') + 1);

    ((history) => {
      var pushState = history.pushState;
      history.pushState = (state, key, path) => {
          pushState.apply(history, [state, key, path]);
          this._onUrlChange();
      };
    })(window.history);

    window.addEventListener('popstate', function (e) {
      // Currently browsing by the browser history buttons ( back / forward )
      // doesn't cause any effect on a sp conditionally loaded page.
      // this._onUrlChange();
    });