change of currentIndex in StackLayout freezes and kills app when TextField has focus

Hello,

To reproduce the issue, run the attached example and click to the left of the blue square to give the TextField focus. Then, type something and click on the blue square to change currentIndex of StackView. The app freezes...

Hotfix I can manage by removing focus before currentIndex changes... but its terrible fix

Happens in Android Emulator as well as real device (tried v8a and v7a)

attached is minimal code example as well as all logs (applicaiton output have my comments)

there is no output what QT doesnt like other then:

I ilmtoro.appTest: Thread[5,tid=23605,WaitingInMainSignalCatcherLoop,Thread*=0x71bc7562c0,peer=0x131401f8,"Signal Catcher"]: reacting to signal 3
03-31 17:02:45.172 23600 23605 I ilmtoro.appTest:
I ilmtoro.appTest: Wrote stack traces to tombstoned
17:02:50: 
"com.filmtoro.appTest" died.