I am using the ISY 994i and up until a few weeks ago everything was working great. Now if I turn lights on or off other lights that are on will flash on and off. I have several motion sensors to control outside lights and when those are activated and the light outside comes on and then turns off after programmed setting in ISY 994 some of my inside lights that are on will flash on and off then back to on. Do I have a bunch of switches going bad? All my switches are the Insteon togglelinc type. Anyone have an idea what is happening. Thamks

Do you notice if it's always the same inside lights that turn on, off and then back on?

Have the motion sensor batteries been replaced recently? Maybe something to try.

Its not just the motion sensor. I have a couple insteon multi button remotes that do the same thing just randomly flashing some lights on and off. I have two togglelinc switches for my hall light for stairs going upstairs and when I turn those two on or off they also make other lights flash on and off. This is all random. I have not made any changes to the programming in the ISY 994I for a couple years, this just started a few weeks ago. I have checked all the settings in the 994 and nothing looks different. Are all my togglelinc switches failin? They were all purchased and installed in the same year or so, 10 - 12 years ago