While SSR is known to have reflection cutoffs, it should only happen when the cut off part is off screen. On the image, the whole cliff is visible on screen, but only ~20% of it is reflected in the water. Moving up and down increases and decreases the reflection height respectively. It seems like anything above the crosshair is not accounted for the reflection. Clouds, for some reason, are an exception.
Steps to reproduce: look at anything tall near the water (mountains, for example)
Expected result: the object should be fully reflected, as long as it is fully on screen
Actual result: the reflection is cut off very shortly
How does your game behave with different settings? The amount of vertical space reflected is directly tied to the reflections slider in the video settings.