Steps:

1. Create a qt quick project.
2. Open the main.qml file with qml design.
3. Add a rectangle to the main rectangle.
4. Set the color to "#808080", and then change the rectangle color to transparent.
5. Click "Ctrl + Z" to cancel the user operation.

Expect result:

The user operation canceled, the rectangle color reset to "#808080", and all the value and button status of Colors setting buttons are correct.

Actual Result:

The transparent button also shows pressed.