Navigator preview tooltip image not correct for a qml component that has image as root item

Steps to reproduce:

• Open a project
• Choose File -> Add new File or Project
• Choose Qt Quick files -> Qt Quick File
• Give it a name and choose Image as root item
• Import some .png and drag and drop it on top of root image item in navigator
• Save changes and return to main qml file
• Drag and drop created component to navigator and hover mouse over it
• -> preview tooltip image shows only hourglass image

Library preview image looks correct for the component.