Airspan UL warning

May be old news (from July), but I just bumped into it.

UL has issued a warning for Airspan Ethernet Adapter, including photos of the product. Not sure this warning has any effect on Airspan business.

However, this warning is interesting to me for another reason: How UL found out this product was not certified? Did a product malfunctioned which triggered an investigation, or was it a routine check?

If you can shed some light on UL process and warnings, please comment.