Strange behaviour for Invisible walls

[Doug_N]

I have submitted this to tech support but thought the rest of you may be interested in this situation.  

 

When turning a wall invisible, only the portion of the wall above the default floor elevation becomes invisible.  Any portion of the wall below the default floor level remains visible.  It would seem that this is not how previous versions behaved, as illustrated in a training video for version X9 https://www.chiefarchitect.com/videos/watch/323/creating-a-split-entry.html

 

here is what it looks like in ver X9 

 

 

 

Here are the results that I have observed in X11 

 

For those of you that are interested in the project file, I have included it as submitted to tech support.  

 

 

Split Entry.zip

[Doug_N]

I have discovered via tech support that if you check the "wall extends below floor" the area below the floor also disappears.  Mystery resolved.