Corrected use of self.bezier_alphas in VMobject.change_anchor_mode

Author: chopan050

manim/mobject/types/vectorized_mobject.py

@@ -928,7 +928,7 @@ def change_anchor_mode(self, mode: str):
                 # thus making the Bézier curves straight lines
                 starts = submob.get_start_anchors()
                 ends = submob.get_end_anchors()
-                for a in self.bezier_alphas:
+                for a in self.bezier_alphas[1:-1]:
                     submob.points[1::nppcc] = interpolate(starts, ends, a)
 
             elif mode == "smooth":