Error when modeling in Normal mode, but not in Preview

Hi TheWonderPie, for the missing part one of the recommendations is to change reconstruction region (increase its size and rotate it a bit around vertical axis).
Other recommendations are to set Minimal distance between two vertices (Reconstruction settings - Mesh calculation) to a value; e.g. 0.0001 or higher. Also raise the number of Maximal vertex count per part (Reconstruction settings - Advanced) to a higher value; e.g. 10M or 20M.

Also, it seems, that you used video to create images. As the person could move during capturing, the results won’t be ideal in this case.