Norton Family no-longer working on Kindle Silk Browser?

Hello everyone, is it just me or did Norton Family web-filtering stop working in the built-in Silk browser on Kindle Fire tablets? 

I used to get the website blocked notifications from my son's tablet, they stopped, I got suspicious, and here I am watching porn on his tablet!!! 

No logging, no blocking. 

I removed and re-installed Norton Family, same thing. 

Is anyone else having this issue? 

Cheers,

Steven