Hi,
Hitching on moving the gizmo or changing a property is indicative of a heavy construction script (and not necessarily a highly detailed object), since the construction script will run when a property is changed and by default when the object is dragged around the viewport.
If you have access to the class settings of whatever object you are dragging around and noticing hitching (e.g. you could create a Blueprint subclass of your volume to access this, if this is an Engine class), then you can disable Run Construction Script on Drag to at least figure out if this is the cause.
Thanks,
Hayden