To reproduce this bug:
- Open the view "Ultrasound Support"
- Create a new video device, Webcam as dummy image is fine
- Activate Device (you should see the live image, possibly global reinit is requried)
- Switch to tab "US imaging"
- Click "Freeze"
- Click "Freeze" again to unfreeze => nothing happens, the application freezes, somtimes it reacts after a few seconds, sometimes it crashes