On windows, as soon as I create a basic QWebEngineView object with the --enable-logging argument, I have 2 QWebEngine processes that are started: one attached to the main application (the renderer) and one detached from the main application (type=utility), and shown in its own window. On Linux, the second process is attached to the main application and no window is shown.

Expected:

No console window is opened and the second instance of QtWebEngineProcess remains attached to the main application.

Code to repro the issue:

#include <QApplication>
#include <QWebEngineView>

int main(int argc, char *argv[])
{
	std::vector<char*> new_argv(argv, argv + argc);
	new_argv.push_back(const_cast<char *>("--enable-logging"));
	new_argv.push_back(nullptr);
	argv = new_argv.data();
	argc = argc + 1;
	QApplication a(argc, argv);
	QWebEngineView w;
	w.load(QUrl("http://www.google.com"));
	w.show();
	return a.exec();
}

 Screenshot.