qml two dynamic window(application modal) raise() and requestActivate() slot event problem

Hi. I recently ran into a strange problem while coding.

there is two dynamic window.(A window, B window)

these windows are application modal.

timer1 set interval 5 second and repeat and if signal trigger A window open.

If A window already open, A window is call raise() and requestActivate()

timer2 set interval 7 second and if signal trigger B window open.

timer2 set repeat false.

I naturally thought that the B window was above the A window. like 1.png

but that wasn't the case.

with the raise() and requestActivate() call, A window has raise above B window. like 2.png

So A window appears to have input focus. but B window has input focus. 

If A window and B window same position and same width, height

you can't input click and touch event.

I think you can use raise() and requestActivate(), It seems correct that it does not work in this structure.

Was it intentional? or bug?

if it is a bug, was it fixed in a higher version?

if you want to my source code, I give for you

thanks you.