QWebEngineView urlChanged regression

I am generating a report as an HTML document and displaying it with a QWebEngineView. This report uses internal links such as <a href="#project_summary">.

I have been using the following to add "Back" and "Forward" capabilities to a QWebEngineView:

   connect( mWebView, &QWebEngineView::urlChanged, this, [=] () {
      mUI->mActionBack->setEnabled( mWebView->history()->canGoBack() );
      mUI->mActionForward->setEnabled( mWebView->history()->canGoForward() );
   } );

It seems that QWebEngineView::urlChanged is no longer emitted when clicking on these internal links even though the URL has changed.

This is working in Qt 5.9.5, but not in 5.10.1 - using the maintenance tool versions.