Possible Bug R6250 - WMM Enabled causes hardwired Tivo Mini to be unable to stream video

Greetings.  I'm having an issue with streaming video from a Tivo (connected to a seperate switch) to my Tivo Mini which is connected to a R6250.  I was able to issolate the problem to the "Enable WMM setting" under the QoS settings.  This seems to need to be enabled in order for my wireless devices to take advantage of higher speeds of 802.11AC.  In fact, when it is disabled, I can only connect at 54 Mbps per Windows connection status.  As soon as I enable WMM, the Tivo no longer can stream video.  Again, the Tivo is hardwired via ethernet.  When I disable WMM, it starts working right away.  I'd like to be able to use both WMM and the Tivo and am not sure how this wireless setting is effecting the routing of ethernet traffic through the switch.  I wanted to report this as a bug in case anyone else is having a similar issue and has found a resolution. Firmware V1.0.4.2_10.1.10