What the FCC Ban on Foreign-Made Robot Vacuums Means for U.S. Consumers (consumerreports.org)

I am unsatisfied with the reporting about why this is happening. The article explanation has almost no substance. What are the specific details?

I have a robot vacuum cleaner. I am struggling to figure out how it could possibly be a national security hazard... It can't even manage stairs, so the Dalek Solution is pretty much a hard stop...