Had the same problem, many rooms would not display.

Found the "Limit offset" by mistake was 32000mm instead of 3200mm and the room will not display correct if it collides with one or more rooms on other floor levels.

The sollution was to set up a schedule with room data incl. "Limit offset" and simply go through all of them to correct the height.

Hope this information can help some of you out there

Henrik