Weird behavior when switching the view between Image and Camera

[stereoMatching]

I explicit specified the state of "FULLSCREEN" in main.qml as

State {
            name: "FULLSCREEN"
 
            PropertyChanges { target: photoTest; state: param.fullScreenPreviousState == "PHOTO" ? "PHOTO" : "CAMERA"} //new conditon
            PropertyChanges { target: toolBarTest; width: 0}
        }

State {
            name: "FULLSCREEN"

            PropertyChanges { target: photoTest; state: param.fullScreenPreviousState == "PHOTO" ? "PHOTO" : "CAMERA"} //new conditon
            PropertyChanges { target: toolBarTest; width: 0}
        }

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We have to explicit specify all of the conditions of different components when changing state?