program with QWebEngineView can't run in QtCreator after macdeployqt

Take markdowneditor as example, and it's a demo of qt under "qtwebengine\examples\webenginewidgets".

1. Open the markdowneditor .pro by QtCreator, and then compile and run. Everything goes well. (Look at the attachment "image1-1".)

2.  Run "macdeployqt markdowneditor.app" under the proper directory. The Qt libs were installed to the app dirs.

If run the markdowneditor.app directly, the result is same as "image1-1png".

But if run the app in QtCreator, the resut is attachment "image2-1.png".