Steps:
1. Create a qt quick application project.
2. Open the main.qml in designer mode and delete all the controls except the background rectangle.
3. Change the background rectangle radius to its max.
4. Add one rectangle control to background rectangle, set the id to "rectangle1"
5. Save the main.qml file and close the file.
6. Reopen the main.qml file in designer mode.
7. Check the radius property of background rectangle in property window.

Expect result:
The radius property of background shows correct.
Actually result:
the radius property of background shows not correctly. See the picture attached.