thumbnail is updated at an unintended timing

This seems to be because the OrbitZoom of ThumbnailInfo is rewritten by ResetCamera () when the viewport is opened.
Is this correct processing?

1. Create a new blueprint. (Inherits actors)
2. Add a cube component.
3. Edit thumbnail in the content browser. (Zoom up as much as possible.)
4. Open BP, check viewport and save.
5. The zoom of the thumbnail changes.