Connection Benchmark fails during ping test under load

[oetbkr123]

Whenever I try to run a connection benchmark for the XR1000 in dumaOS, the connection fails and I get a message that my connection to the router has been disconnected. 
Running an automatic QoS setup causes the same issue. I cannot successfully run the auto setup for QoS or the connection benchmark UNLESS I highly limit my download speeds below 200 Mbps globally.  

This was not happening in other past firmware's, until this newest update. 

Thank you for your assistance.