diff --git a/manimlib/mobject/types/vectorized_mobject.py b/manimlib/mobject/types/vectorized_mobject.py
index 759e7d0d..fcab57c9 100644
--- a/manimlib/mobject/types/vectorized_mobject.py
+++ b/manimlib/mobject/types/vectorized_mobject.py
@@ -995,6 +995,9 @@ class VMobject(Mobject):
         v12s = points[2::3] - points[1::3]
         curve_orientations = np.sign(cross2d(v01s, v12s))
         self.data["orientation"] = np.transpose([curve_orientations.repeat(3)])
+        # Read into fill_data so there are no locked data issues later
+        self.fill_data = resize_array(self.fill_data, len(points))
+        self.fill_data["orientation"][:] = self.data["orientation"]
 
         concave_parts = curve_orientations < 0