Hello Akim,
can you please switch the left-most panel to 1Ds and check how many components have been created? I suppose that RC could not merge all images together with the current settings and perhaps several chunks were created. Due to this, when you run the reconstruction, there are missing data from some angles and RC is enclosing the volume with large triangles there (RC creates watertight meshes).
Since your object is uni-color and featureless, you probably need to raise the alignment settings a little. Please try to change in the Alignment settings Detector sensitivity to High and also try to raise Max features per image and Preselector features (e.g. 60 000, 20 000 respectively).