I have the D3 Engineering IWR1443 kit and I've loaded the ROS viz example and started some code surrounding it.
I can't seem to pinpoint it but sometimes there is often at least one point that wavers between .122066 and .122923 Meters away from the sensor. Every time it happens those are the two numbers. Sometimes these points don't go away for hours, sometimes changing orientation helps it and other-times not. I'm yet to discern a pattern from it. I also have an issue with the sensor forming sometimes several large arcs at various distances from the sensor. I've seen some span 180 degrees and always perpendicular to the "X axis." Among the clutter moving objects can still be made out.