When I was hiking this past weekend I had an issue where my PEN just seemed to stop communicating to the lens. I mean, AF didn't work and the camera just became really sluggish. I tried pulling the battery out and re-seating the lens and neither worked. When I put on the 4-150 with the adapter, the camera worked just fine. This was really frustrating, because when I got back to the hotel room, without doing anything, the lens started to operate properly. Anyone else see this issue?