Kekulization / visualization bug?

Hi guys,

I'm sorry if I come back to this problem again but I'm quite confused. If I upload an aromatized molecule in sdf format, then import it into RDKit and aromatize it, it seems that the loss of aromaticity is not only a rendering problem. In facts I tried to render the “RDKit Mol (Aromatized)” column with Marvin, Indigo and also sdf string but in all these cases I can see no aromaticity. As you can see in the picture in case of sdf srting the bond types are alternate singles and doubles but not aromatics.

Please, can anybody clarify this behavior?

Gio