Reproduction:
1., Build and run the attached application on a device with EGLFS
2., Press show dialog
3., Click on the text editor
4., Start a drag with the mouse
5., Move the mouse outside the dialog
6., Release the drag
Result:
The cursor is still Qt::IBeamCursor
Expected result:
The cursor is normal Qt::ArrowCursor

Note: if the mouse is released over the dialog, then it works fine