Unexpected Trace results when tracing upstream and downstream in Electric Utility Network

[gis_KIWI4]

Hi Team, 

Hoping someone has come across this and may be able to help. 

I have a substation with 33kV and 11kV lines. When I run an upstream trace I notice that it has not selected the elements encircled in green. 

When I trace downstream it works as expected. 

What am I missing? 

[MikeMillerGIS]

What version of ArcGIS Enterprise?  There were some issues I recall with how tracing evaluated all paths.  Also, not sure how and where the controllers are.

[gis_KIWI4]

Hi Mike, 

We are on Enterprise 11.1.

The switches highlighted are subnetwork controllers for the high voltage tier (red lines).

The subnetwork controllers for the subtransmission tier are out of the picture.  

[MikeMillerGIS]

My only guess is there may be indetermiate flow on the bus work and that is why is it not making it to the other transformer.  If you put a trace flag on the bus work, maybe in the middle, what does upstream do?

[gis_KIWI4]

@MikeMillerGIS  - It's the same as before.
Expected result is that the green path drawn below should be highlighted as well.

When I do a connected trace it selects both paths (which I think is to be expected) 

Same result when I do a downstream trace it correctly selects both the sections. 

Based on what I am seeing there doesn't appear to be a problem with subnetworks or the connectivity. Could it be the topology - mesh or radial that could be the issue? 
But my understanding is that attribute should have no effect on the trace.