RT-AC3100 & BufferBloat

So I was checking this DSL Reports site out and they have a speedtest, decided to take one and it all seemed good. The question I have what is Bufferbloat and how can I fix it, or do I need to contact my isp, I am running FW 3.0.0.4.380_858

Thanks.

http://www.dslreports.com/speedtest/2269444