QML Profiler does not start

Steps to reproduce

1. I open the "swipetoremove" example from Qt Quick Controls 2.
2. I select Analyze -> QML Profiler

Expected outcome

In the QML profiler view the "Profiling application" message is displayed and the elapsed seconds counter starts running. When I close the application I see some statistics.

Actual outcome

Nothing happens. No messages are displayed and the counter stays at "Elapsed: 0.0 s". When I close the application no statistics appear anywhere.

Notes

It works with 4.3.1 from the unified installer. Doesn't work with 4.4.0-beta1 installed separately (but still using the same Qt version from the unified installer).

The only message to stderr is

Unexpected run control state  "RunControlState::Stopping"  have: "RunControlState::Running"

printed when closing the application.