Corridor handles dissapearing after processing corridor

My corridor handles are disappearing when I process a corridor. I have been working in these files for days with no problem, but the past day when I get into any file to update it, the handles immediately disappear once the process corridor is complete. My view attributes --> constructions are turned on and the levels are on, and since they were showing before I process the corridor, I can't figure out what is making them disappear. I have tried the key in civil display browser --> Repair relationships to see if maybe the file is corrupt but that doesn't make them reappear and the files themselves seem to be working for everything else that I do. I have had them disappear before, and after a couple times processing the corridor they come back, but this time they seem to be permanently gone no matter how many times I process them. I can see the corridor and template drops under the Project Explorer and everything looks like it is pathing to the correct places, so I don't believe it has lost a reference to anything. The only way I can select the corridor to update it is to turn the 3D model on in the 2D view and select it that way. Any ideas? Thanks in advance!