About QWebEngineView Crash

When I create QWebEngineView via Py script call in my Qt application, setUrl() will crash. But when my program starts, I do the same thing as the script, and QWebEngineView works well！

This is my script:
auto webview = new QWebEngineView(this);
webview->setUrl("http://xx.com");
webview->show();

The difference is that the calling time is different. Called when the program starts, it works well, and after the program starts, it will crash.

 So I have to call it at the beginning of the program

try

{ auto webview = new QWebEngineView(this); webview->setUrl("http://xx.com"); webview->resize(0,0); delete webview }

catch(...)

{ ... }

 

so that my program can work properly