Unwanted Lines on AnimatedSprite3D

Godot Version

4.2.1

Question

I’m having a problem with an AnimatedSprite3D in my game. Strange lines appear at the top of the sprite, which I have deduced are the bottom of the sprite leaking into the top.

I have looked for various ways to solve this but none of them have worked. Does anyone know how to get rid of these lines other than adding an extra row of blank pixels to the bottom of each sprite?