The attributes will be set according to the Attribute presentation settings in Diagrams Options. Attributes that are marked as read only or not marked as “copy with shape” will not be set. If two shapes that points to the same element in database are copied, for example primary and secondary equipment items, it might be that one shape inherited settings from its master but the second one depends on diagrams settings. If there is a conflict in the attribute presentation rules for these shapes, then the attribute will not be copied.