I have set up a file for five story building. I then made 5 copies of the file ( one for each floor) and then referenced the floor design layers back into the original file. When I cut a viewport section on the referenced layers many of the section styled walls, stairs, floors etc. do not show up or show unfilled. If I break the reference they work fine. If I cut the same section in the referenced file itself they work fine. What is going on? Any help would be appreciated. As a simple example, if I create a stair on the first floor plan and cut a section through it the stair and landing show gray ( as my section style is set for). If I update the referenced layer in the target file and cut the same section, it shows up white and the landing doesn't show at all! (VW 12.5)