I have a 2006 Outback with intermittent disablement of the remote when parked in my driveway. My dealer said they had never run into this problem. The service manager @ another dealer ran in to this problem once which he attributed to interference from a commercial radio tower nearby. However his problem occurred all the time when parked @ the same location. It dawned on me that I have a ham radio operator nearby with a monstrous tower in his yard which probably doesn't operate continuously. Anybody out there with a similar problem.
I've learned to live with mine since it seems to self correct in 15-20 minutes & it works perfectly when I'm away from home.