QOpenGLWidget don't receive anymore mouse events once touch events are received from the trackpad

This might be Yosemite specific, not sure about that. It doesn't happen on Windows for sure, even with a touch screen.
My application is using QOpenGLWidgets, and theses QOpenGLWidgets detects touch events. Once the trackpad is used to navigate through theses widgets (double fingers gestures), at some point the widget completely loose mouse focus, and it doesn't get it back no matter what part of the application is clicked.

I attached a video a tester sent me showing the problem: zooming/panning using the application controls (the timeline on the top for example) is no problem and the tools reacts properly (setMouseTracking is always set to true), but as soon as he use the trackpad (sending touch events), after a few seconds the focus is completely lost, no tools react, meaning no more mouse events are received in QOpenGLWidgets. The other non-opengl widgets reacts properly to mouse events.