When I enable the WMM (Wireless Multimedia) setting, which allows the full bandwidth of ac, and the computer is for instance streaming online video, or video over ip within a browser like a chatroom, I am unable to open another page on the same computer. The browser is academic, including if I try to use a different browser for each. The source of the video does not influence the performance either. I will try to resolve another webpage, which this page doesn't matter except that smaller pages are more likely to go through, but not by much. Sometimes trying over and over again will yield a result, other times not. I have played with the QoS settings to no avail, and turning off the WMM uses the 802.11a standard only and connects at 54 Mbps. Any ideas as to why this is happening and how to fix it?
My wifi scans read the width as such: 20 MHz for 5 GHz and 20 MHz for 2.4 GHz with WMM disabled, and 80 MHz for 5GHz and 40 MHz for 2.4 GHz. This problem only occurs on my MacbookPro 11,3 15 in Retina, as it is the only computer on my network that uses 802.11ac, and while it is happening on my MBP I can load a webpage on my iPhone, or another computer just fine.