Scanner gets lost and can not close the right object there is creating objects inside the object I will show the video to see the reference points below changing position and a mini revopoint
In my experience, tracking is rarely accurate when transitioning through the thin side.
Try adding objects next to what you are scanning to improve your result.
There is not enough tracking points on the sides, use marker mode for this kind of scanning or add additional elements on the sides to support the lack of features , it will helps to stabilize the tracking .
And as always the to scan at angle and not direct at 90 degrees. Perfect capture require more than one angle to be scanned to get all the under cuts perfectly not just vertically but also horizontally.