Don't deepcopy ShaderWrapper

manimlib/mobject/mobject.py

@@ -652,9 +652,13 @@ class Mobject(object):
         return self
 
     def deepcopy(self) -> Self:
+        self.parents = []
+        result.target = None
+        result.saved_state = None
+        for submob in self.get_family():
+            submob._shaders_initialized = False
+            submob._data_has_changed = True
         result = copy.deepcopy(self)
-        result._shaders_initialized = False
-        result._data_has_changed = True
         return result
 
     def copy(self, deep: bool = False) -> Self:

manimlib/shader_wrapper.py

@@ -63,6 +63,12 @@ class ShaderWrapper(object):
         self.init_vertex_objects()
         self.refresh_id()
 
+    def __deepcopy__(self, memo):
+        # Don't allow deepcopies, e.g. if the mobject with this ShaderWrapper as an
+        # attribute gets copies. Returning None means the parent object with this ShaderWrapper
+        # as an attribute should smoothly handle this case.
+        return None
+
     def init_program_code(self) -> None:
         def get_code(name: str) -> str | None:
             return get_shader_code_from_file(