I couldn't access TP all day yesterday on my Mac. Most of the time I simply got "server not responding". Once I got through but it took 5+ minutes to only partly load. I managed to establish through off-site contact with 3 members that TP was up and working fine. It wouldn't work with either Safari or Firefox on my Mac, but it worked on my phone and the downstairs family Win10 box. I tried all sorts of things including turning Ghostery off, nothing worked. I rebooted twice, and also rebooted the router and the mesh node I was connected to. No joy.
Eventually last night I checked my Deco app for the second time, only this time I probed a bit deeper. There were multiple blocks of a "malicious site" since around 8 am. Yes, that site was TP! I don't know what caused it, but I was able to unblock the "malicious site" and TP sprang into action again.
I don't understand what caused it, nor do I understand why it only affected one of the two Deco M5 nodes (the Win10 box would definitely have been connected to the other Deco) I had wondered if the problem was connected to an issue when Safari suddenly died, losing all tabs, but I _think_ that was later in the day. It's quite annoying that Deco blocks the sites silently, simply telling me they were inaccessible.
Probing back and bit further, it blocked a few other sites, including a Hertz site which explains a problem I had trying to book a car with them, and also googlemail's IMAP site (which now appears to be working fine).
Anyway, all's well (ish) but I thought it worth reporting in case others get caught out.