[V8i] DGN file created in V8 2004 does not look the same when opened in V8i.

Hi there, this is my first post on this forum.

I have a problem with some of the drawings/models created by our contractor in Microstation v8 2004 and TriForma. When I open them in v8i SS3 some elements are missing. 

The screenshots below show the same dgn file opened in v8 2004 (left) and v8i (right). As you can see the U-shape grey shading is not shown in v8i, although all the levels are turned on. According to file properties this drawing was created in Microstation v8.5.2.55, but the element information tools says the missing object is TriForma Solid.

My question: is there an option or variable in Microstation v8i I should change to make it displaying this drawing correctly?