I'm having the lag spike issue too when streaming. It makes playing ps4 online impossible when someone is streaming.
Please see the pingplotter data, as you can see, its stable to start with without streaming and then goes erratic when I start streaming netflix.
My contract is up soon so I will be leaving for sky fibre.
Thank you for posting. I'm a bit of a gamer myself and I can understand how frustrating lag can be. If you send me in your details, I'll run a few checks on your line to see if anything can be done to improve the latency.
I have sent you a private message with instructions on how to contact me. You can access your messages via the envelope icon at the top right of the screen, or click on this link, Private messages
Thanks for sending in the account details.
I have requested that some changes are made to your broadband setting to try and make the connection more stable when gaming and running a stream at the same time. Can you test the connection over the next few days and let me know if you see any changes?
How are you connected to the hub at the moment?
Thanks, I hope that sorts the issues.
My ps4 has a wired connection to the hub.
Many Thanks, Adam