From my hard wired PC to the router, pinging the router. The ping time should be consistently less than 1 millisecond. When this issue is occurring, it is NEVER less than 1 millisecond, but all over the place including over 200-300 milliseconds at time. It does affect latency outside of the network and also the latency between other devices on my lan. I also tested on the WIFI and the same problem exists there, although I realize you will never get a less than 1 millisecond response time. Ping over wifi also wasn't consistent within reason. Doing it from my phone sitting right next to the router and it was also all over the place, from anywhere between 10ms and 500ms. When the issue is resolved, it's less than 10ms no matter when I am in the house.