Hello! I just purchased an older but in great shape 105mm 2.8. Everything seems fine with the lens, except when I focus all the way out, it loses connection. If I'm autofocusing, and it focuses far away, it loses connection and won't work anymore until I switch to manual focus and move it back. If I move it slightly back from infinity, the connection comes back, and its consistent I this. I can't find anyone else who's had this problem! Anyone out there get this before? Thanks!