Hi @thirdprize thanks for your reply here.
I'm sorry but you haven't mentioned how things have been, from what we can see on our side a new Hub isn't required at the time of writing.
You have said too that this doesn't impact the majority of your devices, which can demonstrate it is device-specific or activity-specific issues.
If you are streaming for example, then this may benefit you more on a wired connection via ethernet.
For further support on WiFi troubleshooting, please see here.
We hope this helps.
Many thanks
Tom_W