I have been using very stable insteon/PG3 system for some time. Recently (after some nearby construction power outages) I have lost communication with 3 of my insteon devices (1 2-wire switch and 2 lamplincs). I have gone thru the usual device delete/factory reset with no luck. When I try to add the switch back, I get a "cannot determine insteon engine" alert after 10 seconds or so. Under Tools, event viewer says switch failed to add, reason 3. For the lamplincs, under device communication events, I get [inst-ack] 02 62 3E.5D.8F LTS req and LTONRR (FF).
Interestingly, when I add the lamplincs to IOX in the location where the Polisy is, they work OK. Any thoughts? I am running 5.8.4.