diff --git a/amf-apicontract.versions b/amf-apicontract.versions
index 3f40f46054..c8421cea45 100644
--- a/amf-apicontract.versions
+++ b/amf-apicontract.versions
@@ -2,5 +2,5 @@ amf.apicontract=5.3.0-SNAPSHOT
 amf.aml=6.3.0-SNAPSHOT
 amf.model=3.8.1
 antlr4Version=0.6.22
-amf.validation.profile.dialect=1.4.0-SNAPSHOT
+amf.validation.profile.dialect=1.5.0-SNAPSHOT
 amf.validation.report.dialect=1.2.0-SNAPSHOT
diff --git a/amf-cli/shared/src/test/resources/validations/raml/union-annots-dont-override-member-annots/api.raml b/amf-cli/shared/src/test/resources/validations/raml/union-annots-dont-override-member-annots/api.raml
new file mode 100644
index 0000000000..08ad174323
--- /dev/null
+++ b/amf-cli/shared/src/test/resources/validations/raml/union-annots-dont-override-member-annots/api.raml
@@ -0,0 +1,25 @@
+#%RAML 1.0
+title: Something
+annotationTypes:
+  complex:
+    allowedTargets: TypeDeclaration
+    type: string
+  flag:
+    type: nil
+    allowedTargets: TypeDeclaration
+
+types:
+  Type1:
+    (complex): "Type1"
+    type: object
+    properties:
+      type1prop: string
+  Type2:
+    (flag):
+    type: object
+    properties:
+      type2prop: string
+  Union:
+    (flag):
+    (complex): "Union"
+    type: Type1 | Type2
\ No newline at end of file
diff --git a/amf-cli/shared/src/test/scala/amf/validation/AMFModelAssertionTest.scala b/amf-cli/shared/src/test/scala/amf/validation/AMFModelAssertionTest.scala
index 02d9abc6d7..320af7dccb 100644
--- a/amf-cli/shared/src/test/scala/amf/validation/AMFModelAssertionTest.scala
+++ b/amf-cli/shared/src/test/scala/amf/validation/AMFModelAssertionTest.scala
@@ -7,17 +7,20 @@ import amf.core.client.common.transform.PipelineId
 import amf.core.client.scala.config.RenderOptions
 import amf.core.client.scala.model.document.{BaseUnit, Document}
 import amf.core.client.scala.model.domain.extensions.PropertyShape
-import amf.core.client.scala.model.domain.{AmfArray, Annotation, ExternalSourceElement, Shape}
-import amf.core.internal.annotations.{DeclaredElement, Inferred, VirtualElement, VirtualNode}
+import amf.core.client.scala.model.domain.{AmfArray, Annotation, ExternalSourceElement, ScalarNode, Shape}
+import amf.core.internal.annotations.{DeclaredElement, Inferred, SourceYPart, VirtualElement, VirtualNode}
 import amf.core.internal.parser.domain.Annotations
 import amf.graphql.client.scala.GraphQLConfiguration
+import amf.shapes.client.scala.config.JsonSchemaConfiguration
+import amf.shapes.client.scala.model.document.JsonSchemaDocument
 import amf.shapes.client.scala.model.domain._
 import amf.shapes.internal.annotations.{BaseVirtualNode, TargetName}
 import amf.shapes.internal.domain.metamodel.AnyShapeModel
 import amf.testing.BaseUnitUtils._
 import amf.testing.ConfigProvider.configFor
 import org.mulesoft.common.client.lexical.{Position, PositionRange}
-import org.scalatest.Assertion
+import org.scalatest
+import org.scalatest.{Assertion, Checkpoints}
 import org.scalatest.funsuite.AsyncFunSuite
 import org.scalatest.matchers.should.Matchers
 import org.yaml.model.{YNodePlain, YScalar}
@@ -479,4 +482,39 @@ class AMFModelAssertionTest extends AsyncFunSuite with Matchers {
       obtainedAst.trim shouldEqual expectedAst.trim
     }
   }
+
+  test("Assert union custom domain properties are not propagated to members") {
+
+    def assertForAllTypes(shapes: Shape*)(assertion: Shape => Unit) = {
+      shapes.foreach(assertion)
+    }
+
+    val api = s"$basePath/raml/union-annots-dont-override-member-annots/api.raml"
+    val cp  = new scalatest.Checkpoints.Checkpoint()
+    modelAssertion(api, pipelineId = PipelineId.Editing) { unit =>
+      val doc   = unit.asInstanceOf[Document]
+      val union = doc.declares.collect { case union: UnionShape => union }.head
+      val type1 = doc.declares.collect { case node: NodeShape if node.name.value() == "Type1" => node }.head
+      val type2 = doc.declares.collect { case node: NodeShape if node.name.value() == "Type2" => node }.head
+      union.customDomainProperties.length shouldBe 2
+      assertForAllTypes(type1, union.anyOf.head) { shape =>
+        cp { shape.customDomainProperties.length shouldBe 1 }
+        cp { shape.customDomainProperties.head.extension.asInstanceOf[ScalarNode].value.value() shouldEqual "Type1" }
+      }
+      assertForAllTypes(type2, union.anyOf(1)) { shape =>
+        cp { shape.customDomainProperties.length shouldBe 1 }
+        cp { shape.customDomainProperties.head.name.value() shouldEqual "flag" }
+      }
+      cp.reportAll()
+      succeed
+    }
+  }
+
+  private def sourcePartOf(unit: BaseUnit, extract: JsonSchemaDocument => Shape) = {
+    val doc             = unit.asInstanceOf[JsonSchemaDocument]
+    val shapeOfInterest = extract(doc)
+    val sourceYPart     = shapeOfInterest.annotations.find(_.isInstanceOf[SourceYPart]).get.asInstanceOf[SourceYPart]
+    val obtainedAst     = sourceYPart.ast.toString
+    obtainedAst
+  }
 }
diff --git a/amf-shapes/shared/src/main/scala/amf/shapes/internal/domain/resolution/shape_normalization/MinShapeAlgorithm.scala b/amf-shapes/shared/src/main/scala/amf/shapes/internal/domain/resolution/shape_normalization/MinShapeAlgorithm.scala
index 3b601fc8b5..eab375fda3 100644
--- a/amf-shapes/shared/src/main/scala/amf/shapes/internal/domain/resolution/shape_normalization/MinShapeAlgorithm.scala
+++ b/amf-shapes/shared/src/main/scala/amf/shapes/internal/domain/resolution/shape_normalization/MinShapeAlgorithm.scala
@@ -1,5 +1,6 @@
 package amf.shapes.internal.domain.resolution.shape_normalization
 
+import amf.core.client.platform.model.domain.CustomDomainProperty
 import amf.core.client.scala.errorhandling.AMFErrorHandler
 import amf.core.client.scala.model.DataType
 import amf.core.client.scala.model.domain.extensions.PropertyShape
@@ -7,7 +8,7 @@ import amf.core.client.scala.model.domain.{AmfArray, AmfScalar, RecursiveShape,
 import amf.core.client.scala.validation.AMFValidationResult
 import amf.core.internal.annotations.{Inferred, InheritanceProvenance, LexicalInformation}
 import amf.core.internal.metamodel.Field
-import amf.core.internal.metamodel.domain.ShapeModel
+import amf.core.internal.metamodel.domain.{DomainElementModel, ShapeModel}
 import amf.core.internal.metamodel.domain.extensions.PropertyShapeModel
 import amf.core.internal.parser.domain.{Annotations, Value}
 import amf.core.internal.utils.IdCounter
@@ -392,7 +393,7 @@ private[resolution] class MinShapeAlgorithm()(implicit val context: Normalizatio
     baseNode.fields.setWithoutId(NodeShapeModel.Properties, AmfArray(minProps.toSeq), annotations)
 
     computeNarrowRestrictions(
-      NodeShapeModel.fields,
+      NodeShapeModel.fields :+ DomainElementModel.CustomDomainProperties, // custom domain isn't part of nodeshape model fields
       baseNode,
       superNode,
       filteredFields = Seq(NodeShapeModel.Properties, NodeShapeModel.Examples)
@@ -556,7 +557,8 @@ private[resolution] class MinShapeAlgorithm()(implicit val context: Normalizatio
         AnyShapeModel.DefaultValueString,
         AnyShapeModel.Default,
         AnyShapeModel.Examples,
-        AnyShapeModel.Description
+        AnyShapeModel.Description,
+        AnyShapeModel.CustomDomainProperties
       )
     val filteredBase = baseShape.copyShape()
     filteredBase.fields.filter(f => !filteredFields.contains(f._1))