Main menu appear in wrong window

When accessing the menu in QT design studio, they open op outside the window/frame and in another screen.

Setup is: Screen 1 = left and screen 2 is right.

When the window is on screen 2, the menu will appear inside the QT frame. on the location expected 
When the window is on screen 1, the menu will appear top left on screen 2

When the window is split across the 2 screens, the menu will appear in screen 2 inside the QT frame