In a simple test where one of two sibling items binds its visible property to the others !visible (a.visible: !b.visible) the binding seems to get confused as soon as their parent item visible value changes and while the binding seems to be preserved, both of the items end up visible at the same time.

Steps to reproduce the problem:

• Run the attached project.
• click the button a few times

NOTE: there's an easy workaround. By updating green visible property in red.onVisibleChanged handler the problem doesn't occur.