I don’t see that segment in 3D View. In your given data. you have two segments with the same name “segmentation” and the same kind of segments. So actually you must have two
Segmentation.seg.nrrd files. If you are seen the ampulla in 3d view it must have been rendered from the other segment with the same name. But it is clearly not the one you have shared
So if you are seen the ampulla it must be on the other segment. If you select that segment and to it should work
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