If fullscreen application without softkeys opens a fullscreen child dialog with softkeys, once the child dialog closes, softkeys remain visible on application main screen.

Use attached application to reproduce:

1) Launch the application -> Main window is shown without softkeys.
2) Click on "dialog with softkeys" button -> A new fullscreen dialog with softkeys visible is opened.
3) Click "OK" button

Expected result: Dialog is closed and main window is shown without any softkeys visible.

Actual result: Dialog is closed and main window is shown. Main window has exit softkey visible.

If you use "Switch" button to change the dialog mode to "maximized" from default (fullscreen with SK), then the softkeys will not be shown on main window when dialog is closed.