Hi reported this issue last week, my home page which is set to talktalk.co.uk along with my account will not load, I get cannot reach this page make sure you have got the right web address. Sometimes I get cannot securely connect to this page, this might be because the site uses outdated or unsafe TLS security settings. Other web pages load slower than normal at times, also have buffering issues watching live streams, sometimes a router reboot works but usually have to factory reset, this puts things back to normal for hours then repeat. Speed test results are fine, Support says my line and router are working ok, this issue happens with two different routers and three computers whether wired or wireless.
Ping tests sometimes are fine other times 50-75% packet loss.
We are not seeing any other reports of the website being down, Can you do the usual browser checks such as clearing cache and cookies.
Tests are not showing any issues, would you like to try a replacement router?
The next time this happens can you try switching the router off and back on, if this doesn't resolve the issue can you switch it off and leave it off for at least 30 minutes then switch back on and retest. Please let us know how you get on