App UIFigure Visibility Bug

I have Multi-Windows Application written with GUIDE. Currently I Tried to Migrate to App Designer.

My Problem: I Design An App, That Its Visibility Turned Off In App Startup Callback.

In Some Place, I Change The Position of That Windows (In Other Program Module), But Before User Decide to Click A Menu to show That App.

Its Very Odd That, The Windows Appears As Soon As Position Changed. I Tried to Turn It Visiblity Back to Off Again After Position Change Line. But It Didnt Work. Also Functions Like drawnow not useful (At First I Thought It is An Incomplete rendering problem).

This Is Secondary Windows That Should Be Invisible (app2):

function startupFcn(app)

app.UIFigure.Visible= "off"

end

In Master App, I Define ap2 Public Variable:

function startupFcn(app)

app.ap2= app2

end

And This Is Position Change In Some Callback That Tend To Show app2:

function ChangePositionButtonPushed(app, event)

app.ap2.UIFigure.Position= [100, 100, 1000, 700];

app.ap2.UIFigure.Visible

end

As you see, The 2nd Line Echo "off" Value for ap2.UIFigure, While It is shown.