diff --git a/manim/mobject/types/vectorized_mobject.py b/manim/mobject/types/vectorized_mobject.py
index 321fe4287b..9323e1e2fc 100644
--- a/manim/mobject/types/vectorized_mobject.py
+++ b/manim/mobject/types/vectorized_mobject.py
@@ -1061,8 +1061,8 @@ def add_points_as_corners(self, points: Point3DLike_Array) -> Self:
             end_corners = points
             self.points = self.points[:-1]
         else:
-            start_corners = points[:-1]
-            end_corners = points[1:]
+            start_corners = np.vstack([self.points[-1], points[:-1]])
+            end_corners = points
 
         nppcc = self.n_points_per_cubic_curve
         new_points = np.empty((nppcc * start_corners.shape[0], self.dim))