diff --git a/com.unity.cinemachine/Documentation~/CinemachineConfiner2D.md b/com.unity.cinemachine/Documentation~/CinemachineConfiner2D.md
index 12f4a07d9..0e92279a2 100644
--- a/com.unity.cinemachine/Documentation~/CinemachineConfiner2D.md
+++ b/com.unity.cinemachine/Documentation~/CinemachineConfiner2D.md
@@ -16,7 +16,9 @@ In these cases, for efficiency reasons, Cinemachine does not automatically regen
 - the script by calling InvalidateCache, or 
 - the component inspector; to do so, press the **Invalidate Cache** button.
 
-If the input polygon scales uniformly or translates or rotates, the cache remains valid. 
+If the input polygon scales uniformly or translates or rotates, the cache remains valid.
+
+When the Orthographic Size or Field of View of the Cinemachine Camera's lens changes, Cinemachine will not automatically adjust the Confiner for efficiency reasons. To adjust the Confiner, call InvalidateLensCache() from script.
 
 ## Oversize Windows
 If sections of the confining polygon are too small to fully contain the camera window, Cinemachine calculates a polygon skeleton for those regions. This is a shape with no area, that serves as a place to put the camera when it is confined to this region of the shape.