Hello,

When Qos enabled and give the console priority whenever the console start downloading the ping will spike immediately and affects the entire network performance 

Reply from 192.168.0.1: bytes=32 time<1ms TTL=64
Reply from 192.168.0.1: bytes=32 time=440ms TTL=64
Reply from 192.168.0.1: bytes=32 time=5ms TTL=64
Reply from 192.168.0.1: bytes=32 time=197ms TTL=64
Reply from 192.168.0.1: bytes=32 time=309ms TTL=64
Reply from 192.168.0.1: bytes=32 time<31ms TTL=64
Reply from 192.168.0.1: bytes=32 time<1ms TTL=64
Reply from 192.168.0.1: bytes=32 time=1ms TTL=64
Reply from 192.168.0.1: bytes=32 time=47ms TTL=64

When uncheck the priority from the console and keep the Qos enabled with no traffic prioritized for any device the issue resolved and the performance is stable, it's a bug related to Qos and prioritization algorithm specifically, it's not related to specific firmware as it's present in the latest firmware and previous version.