Wire trace was not injected?

Using 4.8 preview 3

I’m getting a wire trace was not injected warning. I’ve tried deleting what should be the offending node / wires and reinserting them without luck. Is there any way to completely recompile all of the blueprints?

LogConnectionDrawingPolicy:Warning: Looks like a wire-trace was not injected before the jump from ‘Cast To Pro_Cabinet_Door_Parts’ to ‘Door Part Gen Cube
Target is Pro Cabinet Door Parts’.