I recently purchased a Bessa R3A and although the rangefinder is apparently aligned correctly, sometimes the rangefinder sticks. I'll turn the focusing ring steadily and the split images will start moving as they should but often stop for a moment and then very quickly move to the position they should be in, usually with a faint click-like sound. I find it only happens when I first start using the camera after it hasn't been used for a while. I know the rangefinders in these cameras are known to become misaligned easily but I've never read anything about this problem. I'm wondering what is causing it and whether this is a problem that could get worse or cause the rangefinder to become misaligned if it continues.