Channel area missing artificial path sections

[jtgilbert]

HUC: 1705011407
project: https://data.riverscapes.net/p/4292f002-ebb8-4d8d-9391-83dccd077c34/
There's a level path in this photo that alternates between FCode 46006 and 55800 and only the 46006 end up getting buffers and included in the channel area output

[jtgilbert]

looks like it's because this is a rare case where the reach is coded as artificial path but actually isn't associated with any waterbody or flow area polygon so it get's filtered out of the flowlines with no polygon to replace it...