Rangefinder parallax practically guarantees you are not getting what your framelines show.
For example, subjects at infinity do not move when you focus closer. But the framelines (of a parallax-corrected rangefinder) do move. The framelines move to indicate boundaries of subject at the plane of focus.
This problem only crops up if you are considering including a sliver of sky and mountaintop in your composition, then you should "remember" where the framelines were when the lens was set at infinity.
I do this somewhat subconsciously when I shoot rangefinders and it's not as hard as it sounds.