Hi Frankwell,
Welcome to our community 
I'm sorry that you're experiencing disruption when using Netflix right now. I will be happy to have a look at this for you.
I have carried out a few checks and all is looking fine signal and power level wise. Network wise all is looking fine here also, I'm pleased to report there's no high demand issues affecting the network your TiVo® is connected to.
I would like to get a little more information form you if that's ok? If you can reply with the following details:
* Does this happen to other apps like BBC iPlayer/YouTube? (If you don't normally use these apps, can you give them a try and let me know if you get the same or similar symptoms?)
* If you reboot the box, is there a difference is speed afterwards?
If you can let me know I can check further.
Collette.