I have used my Caseta Dimmer Switches (one front, one back) on my porches for almost two years with no issues (other than occasional instances where the front lights turn off early). All of a sudden a few nights ago the front porch flood lights (cans) will not turn on. Instead, only one light blinks in a perfectly rhythmic pattern. Not all of the lights, only one. Needless to say, it looks like some kind of emergency alert, and my neighbor called me last night after I forgot to turn it off.What could be causing this weird behavior? Maybe the lights are getting old enough for this to happen? Why does it happen to only one light, and the other five remain off?