diff --git a/src/main/java/org/springframework/data/convert/ClassGeneratingEntityInstantiator.java b/src/main/java/org/springframework/data/convert/ClassGeneratingEntityInstantiator.java
index 23efffcd6..4b19f4eae 100644
--- a/src/main/java/org/springframework/data/convert/ClassGeneratingEntityInstantiator.java
+++ b/src/main/java/org/springframework/data/convert/ClassGeneratingEntityInstantiator.java
@@ -154,6 +154,10 @@ public class ClassGeneratingEntityInstantiator implements EntityInstantiator {
 			return true;
 		}
 
+		if (!ClassUtils.isPresent(ObjectInstantiator.class.getName(), type.getClassLoader())) {
+			return true;
+		}
+
 		return false;
 	}
 
diff --git a/src/main/java/org/springframework/data/mapping/model/ClassGeneratingPropertyAccessorFactory.java b/src/main/java/org/springframework/data/mapping/model/ClassGeneratingPropertyAccessorFactory.java
index 133f09983..582047eb5 100644
--- a/src/main/java/org/springframework/data/mapping/model/ClassGeneratingPropertyAccessorFactory.java
+++ b/src/main/java/org/springframework/data/mapping/model/ClassGeneratingPropertyAccessorFactory.java
@@ -55,6 +55,7 @@ import org.springframework.data.util.Optionals;
 import org.springframework.data.util.TypeInformation;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
+import org.springframework.util.ClassUtils;
 import org.springframework.util.ReflectionUtils;
 
 /**
@@ -139,7 +140,9 @@ public class ClassGeneratingPropertyAccessorFactory implements PersistentPropert
 
 		Class<?> type = entity.getType();
 		return type.getClassLoader() != null
-				&& (type.getPackage() == null || !type.getPackage().getName().startsWith("java"));
+				&& (type.getPackage() == null || !type.getPackage().getName().startsWith("java"))
+				&& ClassUtils.isPresent(PersistentPropertyAccessor.class.getName(), type.getClassLoader())
+				&& ClassUtils.isPresent(Assert.class.getName(), type.getClassLoader());
 	}
 
 	private boolean hasUniquePropertyHashCodes(PersistentEntity<?, ?> entity) {
@@ -1080,7 +1083,6 @@ public class ClassGeneratingPropertyAccessorFactory implements PersistentPropert
 
 			if (kotlinCopyMethod.shouldUsePublicCopyMethod(entity)) {
 
-
 				// PersonWithId.copy$(value)
 				mv.visitVarInsn(ALOAD, 3);
 				mv.visitVarInsn(ALOAD, 2);
diff --git a/src/test/java/org/springframework/data/convert/ClassGeneratingEntityInstantiatorUnitTests.java b/src/test/java/org/springframework/data/convert/ClassGeneratingEntityInstantiatorUnitTests.java
index 1e05d5047..39a6d42c7 100755
--- a/src/test/java/org/springframework/data/convert/ClassGeneratingEntityInstantiatorUnitTests.java
+++ b/src/test/java/org/springframework/data/convert/ClassGeneratingEntityInstantiatorUnitTests.java
@@ -28,6 +28,8 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.Mock;
 import org.mockito.junit.MockitoJUnitRunner;
+import org.springframework.data.classloadersupport.HidingClassLoader;
+import org.springframework.data.convert.ClassGeneratingEntityInstantiator.ObjectInstantiator;
 import org.springframework.data.convert.ClassGeneratingEntityInstantiatorUnitTests.Outer.Inner;
 import org.springframework.data.mapping.PersistentEntity;
 import org.springframework.data.mapping.PersistentProperty;
@@ -356,6 +358,21 @@ public class ClassGeneratingEntityInstantiatorUnitTests<P extends PersistentProp
 		assertThat(this.instance.shouldUseReflectionEntityInstantiator(entity)).isTrue();
 	}
 
+	@Test // DATACMNS-1422
+	public void shouldUseReflectionIfFrameworkTypesNotVisible() throws Exception {
+
+		HidingClassLoader classLoader = HidingClassLoader.hide(ObjectInstantiator.class);
+		classLoader.excludePackage("org.springframework.data.mapping.model");
+
+		// require type from different package to meet visibility quirks
+		Class<?> entityType = classLoader
+				.loadClass("org.springframework.data.mapping.model.PersistentPropertyAccessorTests$ClassLoaderTest");
+
+		prepareMocks(entityType);
+
+		assertThat(this.instance.shouldUseReflectionEntityInstantiator(entity)).isTrue();
+	}
+
 	private void prepareMocks(Class<?> type) {
 
 		doReturn(type).when(entity).getType();
diff --git a/src/test/java/org/springframework/data/mapping/model/PersistentPropertyAccessorTests.java b/src/test/java/org/springframework/data/mapping/model/PersistentPropertyAccessorTests.java
index a98cea6a3..596d382e2 100644
--- a/src/test/java/org/springframework/data/mapping/model/PersistentPropertyAccessorTests.java
+++ b/src/test/java/org/springframework/data/mapping/model/PersistentPropertyAccessorTests.java
@@ -31,9 +31,11 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
 import org.junit.runners.Parameterized.Parameters;
+import org.springframework.data.classloadersupport.HidingClassLoader;
 import org.springframework.data.mapping.PersistentPropertyAccessor;
 import org.springframework.data.mapping.context.SampleMappingContext;
 import org.springframework.data.mapping.context.SamplePersistentProperty;
+import org.springframework.util.Assert;
 
 /**
  * Unit tests for {@link PersistentPropertyAccessor} through {@link BeanWrapper} and
@@ -172,6 +174,22 @@ public class PersistentPropertyAccessorTests {
 		assertThatThrownBy(() -> accessor.setProperty(property, "value")).isInstanceOf(UnsupportedOperationException.class);
 	}
 
+	@Test // DATACMNS-1422
+	public void shouldUseReflectionIfFrameworkTypesNotVisible() throws Exception {
+
+		HidingClassLoader classLoader = HidingClassLoader.hide(Assert.class);
+		classLoader.excludePackage("org.springframework.data.mapping.model");
+
+		Class<?> entityType = classLoader
+				.loadClass("org.springframework.data.mapping.model.PersistentPropertyAccessorTests$ClassLoaderTest");
+
+		ClassGeneratingPropertyAccessorFactory factory = new ClassGeneratingPropertyAccessorFactory();
+		BasicPersistentEntity<Object, SamplePersistentProperty> entity = MAPPING_CONTEXT
+				.getRequiredPersistentEntity(entityType);
+
+		assertThat(factory.isSupported(entity)).isFalse();
+	}
+
 	private static SamplePersistentProperty getProperty(Object bean, String propertyName) {
 		return MAPPING_CONTEXT.getRequiredPersistentEntity(bean.getClass()).getRequiredPersistentProperty(propertyName);
 	}
@@ -181,6 +199,8 @@ public class PersistentPropertyAccessorTests {
 		String id;
 	}
 
+	static class ClassLoaderTest {}
+
 	@Value
 
 	static class ValueClass {