diff --git a/masque/label.py b/masque/label.py
index 3dbbc08..6a2a61f 100644
--- a/masque/label.py
+++ b/masque/label.py
@@ -65,6 +65,7 @@ class Label(PositionableImpl, RepeatableImpl, AnnotatableImpl, Bounded, Pivotabl
         memo = {} if memo is None else memo
         new = copy.copy(self)
         new._offset = self._offset.copy()
+        new._repetition = copy.deepcopy(self._repetition, memo)
         new._annotations = copy.deepcopy(self._annotations, memo)
         return new
 
diff --git a/masque/shapes/arc.py b/masque/shapes/arc.py
index e6d49cf..2adfe10 100644
--- a/masque/shapes/arc.py
+++ b/masque/shapes/arc.py
@@ -187,6 +187,7 @@ class Arc(PositionableImpl, Shape):
         new._offset = self._offset.copy()
         new._radii = self._radii.copy()
         new._angles = self._angles.copy()
+        new._repetition = copy.deepcopy(self._repetition, memo)
         new._annotations = copy.deepcopy(self._annotations)
         return new
 
diff --git a/masque/shapes/circle.py b/masque/shapes/circle.py
index a6f7af1..19f3f2b 100644
--- a/masque/shapes/circle.py
+++ b/masque/shapes/circle.py
@@ -68,6 +68,7 @@ class Circle(PositionableImpl, Shape):
         memo = {} if memo is None else memo
         new = copy.copy(self)
         new._offset = self._offset.copy()
+        new._repetition = copy.deepcopy(self._repetition, memo)
         new._annotations = copy.deepcopy(self._annotations)
         return new
 
diff --git a/masque/shapes/ellipse.py b/masque/shapes/ellipse.py
index 49f6489..38799da 100644
--- a/masque/shapes/ellipse.py
+++ b/masque/shapes/ellipse.py
@@ -117,6 +117,7 @@ class Ellipse(PositionableImpl, Shape):
         new = copy.copy(self)
         new._offset = self._offset.copy()
         new._radii = self._radii.copy()
+        new._repetition = copy.deepcopy(self._repetition, memo)
         new._annotations = copy.deepcopy(self._annotations)
         return new
 
diff --git a/masque/shapes/path.py b/masque/shapes/path.py
index 3aa6f07..7038309 100644
--- a/masque/shapes/path.py
+++ b/masque/shapes/path.py
@@ -235,6 +235,7 @@ class Path(Shape):
         new._vertices = self._vertices.copy()
         new._cap = copy.deepcopy(self._cap, memo)
         new._cap_extensions = copy.deepcopy(self._cap_extensions, memo)
+        new._repetition = copy.deepcopy(self._repetition, memo)
         new._annotations = copy.deepcopy(self._annotations)
         return new
 
diff --git a/masque/shapes/poly_collection.py b/masque/shapes/poly_collection.py
index 711acc4..cd233ba 100644
--- a/masque/shapes/poly_collection.py
+++ b/masque/shapes/poly_collection.py
@@ -124,6 +124,7 @@ class PolyCollection(Shape):
         new = copy.copy(self)
         new._vertex_lists = self._vertex_lists.copy()
         new._vertex_offsets = self._vertex_offsets.copy()
+        new._repetition = copy.deepcopy(self._repetition, memo)
         new._annotations = copy.deepcopy(self._annotations)
         return new
 
diff --git a/masque/shapes/polygon.py b/masque/shapes/polygon.py
index 34a784b..a743de2 100644
--- a/masque/shapes/polygon.py
+++ b/masque/shapes/polygon.py
@@ -135,6 +135,7 @@ class Polygon(Shape):
         memo = {} if memo is None else memo
         new = copy.copy(self)
         new._vertices = self._vertices.copy()
+        new._repetition = copy.deepcopy(self._repetition, memo)
         new._annotations = copy.deepcopy(self._annotations)
         return new
 
diff --git a/masque/shapes/text.py b/masque/shapes/text.py
index 93f2024..5047dc4 100644
--- a/masque/shapes/text.py
+++ b/masque/shapes/text.py
@@ -98,6 +98,7 @@ class Text(PositionableImpl, RotatableImpl, Shape):
         memo = {} if memo is None else memo
         new = copy.copy(self)
         new._offset = self._offset.copy()
+        new._repetition = copy.deepcopy(self._repetition, memo)
         new._annotations = copy.deepcopy(self._annotations)
         return new
 
diff --git a/masque/test/test_pattern.py b/masque/test/test_pattern.py
index 07e4150..e875641 100644
--- a/masque/test/test_pattern.py
+++ b/masque/test/test_pattern.py
@@ -1,4 +1,5 @@
 import pytest
+import copy
 from typing import cast
 from numpy.testing import assert_equal, assert_allclose
 from numpy import pi
@@ -148,3 +149,26 @@ def test_pattern_interface() -> None:
     assert_allclose(iface.ports["out_A"].rotation, 0, atol=1e-10)
     assert iface.ports["in_A"].ptype == "test"
     assert iface.ports["out_A"].ptype == "test"
+
+
+def test_pattern_deepcopy_does_not_share_shape_repetitions() -> None:
+    pat = Pattern()
+    pat.polygon((1, 0), vertices=[[0, 0], [1, 0], [0, 1]], repetition=Grid(a_vector=(10, 0), a_count=2))
+
+    pat2 = copy.deepcopy(pat)
+    pat2.scale_by(2)
+
+    assert_allclose(cast("Polygon", pat.shapes[(1, 0)][0]).repetition.a_vector, [10, 0])
+    assert_allclose(cast("Polygon", pat2.shapes[(1, 0)][0]).repetition.a_vector, [20, 0])
+
+
+def test_pattern_flatten_does_not_mutate_child_repetitions() -> None:
+    child = Pattern()
+    child.polygon((1, 0), vertices=[[0, 0], [1, 0], [0, 1]], repetition=Grid(a_vector=(10, 0), a_count=2))
+
+    parent = Pattern()
+    parent.ref("child", scale=2)
+
+    parent.flatten({"child": child})
+
+    assert_allclose(cast("Polygon", child.shapes[(1, 0)][0]).repetition.a_vector, [10, 0])