Hello vespertinelle,
Thank you for sharing the project file.
It looks like there are many incorrectly aligned cameras in the problematic chunk, so the default view contains the huge area. I was able, however, to zoom it to the area of reconstruction - at first I double-clicked in the area where the main reconstruction has been performed (where the bounding box is situated) and then just zoomed in, until the dense cloud is displayed in proper scale.
But I suggest to solve the bad alignment issues, before proceeding further with this project. For me it also looks strange, that many images have different resolution, it may be a result of camera auto-cropping function.