OpenRoads Concept Station - Image disappearing when adding content

I'm using ConceptStation V10.00.12.41 to develop some concepts for an interchange.  As I'm adding content (mainline, ramps, ramp connections, etc...) I seem to be losing my aerial imagery.  It seems to happen when adding ramp connections.  It also doesn't seem to effect it if I'm zoomed in close...but if I'm trying to view the whole interchange the image starts to disappear.  Has anyone else seen this behavior...any fixes?

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