In the past, all of the exceptions were this IP and it was fixed by changing the "enable IP workarounds" setting. This time, only some of the IPs in the exceptions log are from 10.10.111.x and the rest of normal-looking IPs. Therefore, it doesn't seem to be related to the IP workaround setting.
It doesn't seem to be a problem at this point (I'm not being blocked, myself, for instance) but I'm really puzzled why this would be happening if it's not caused by the IP workaround setting. And since I had problems a few months ago with the setting apparently being reset without me doing it, seeing this IP number again in the log makes me very nervous. I am the only person who uses admin access to the site, so I don't see how it might be another person involved with the site, and as far as I can tell we haven't been hacked.
When you get a moment -- no rush since it's not an actual problem (yet?), just a puzzle -- could someone please hazard a guess as to how and why these are showing up again, but this time only with some of the exceptions? It started yesterday and there have been 7 exceptions since then, so it wasn't a one-off.
Many thanks!