Anker USB charger

I have an iPhone 6s, recently updated to iOS ver 9.3.4 & since the update, my 'Anker iQ PowerPort 6' http://bit.ly/2aVnXE0 - 6-port USB charger hub won't charge my iPhone properly. It has been charging my iPhone perfectly for about 2 months, without any issues. But since updating iOS to 9.3.4 I get a message that says "The cable or accessory is not certified and may not work reliably with this iPhone"

What's going on Apple? Why would you suddenly stop supporting a device that I am using my original iPhone Lightening / USB charging cable with, and have been since I bought it?

Plugged my iPhone in over night to top up charge and when I woke up this morning... My iPhone had completely discharged its battery... Great! Thanks for that