SCNodes disappear and then reappear

I can't post a video I don't think. But in the screen shots, I'm sightly making a circle with the phone and the green lines will disappear and then reappear. Those green lines are drawn via .addChildNode().

We're using RoomPlan to detect cabinets(.storage), and then we outline the cabinets with SCNNodes. We have other methods to capture cabinets that don't use RoomPlan. And the lines for those cabinets do not wink in and out.

Perhaps there is a bug with visibility culling?

We're pretty dang sure the nodes are not disappearing because we are calling .hide() anywhere.

Perhaps object detection from RoomPlan running in the background is interfering?