What could cause poor wireless performance of hAP AC RB962UiGS-5HacT2HnT? I can achieve only about 20mbit/s download and 40mbit/s upload throughput. Hap AC is managed from a capsman. Could it cause problems? I have tested performance with Macbook pro, Macbook air and different android devices. Distance from AP doesn't matter, result is always same. Is there something I could check? Could it be device failure?