diff --git a/x-pack/legacy/plugins/file_upload/public/util/file_parser.js b/x-pack/legacy/plugins/file_upload/public/util/file_parser.js
index bc336d07bde98..8af4150f503da 100644
--- a/x-pack/legacy/plugins/file_upload/public/util/file_parser.js
+++ b/x-pack/legacy/plugins/file_upload/public/util/file_parser.js
@@ -35,7 +35,7 @@ export function jsonPreview(json, previewFunction) {
   // Call preview (if any)
   if (json && previewFunction) {
     const defaultName = _.get(json, 'name', 'Import File');
-    previewFunction(_.cloneDeep(json), defaultName);
+    previewFunction(json, defaultName);
   }
 }
 
diff --git a/x-pack/legacy/plugins/file_upload/public/util/file_parser.test.js b/x-pack/legacy/plugins/file_upload/public/util/file_parser.test.js
index 98f37894b7141..ecbc67f1999a9 100644
--- a/x-pack/legacy/plugins/file_upload/public/util/file_parser.test.js
+++ b/x-pack/legacy/plugins/file_upload/public/util/file_parser.test.js
@@ -4,7 +4,7 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
-import { parseFile, jsonPreview } from './file_parser';
+import { parseFile } from './file_parser';
 
 describe('parse file', () => {
   const cleanAndValidate = jest.fn(a => a);
@@ -61,26 +61,4 @@ describe('parse file', () => {
     // Confirm preview function called
     expect(previewFunction.mock.calls.length).toEqual(1);
   });
-
-  it('should use object clone for preview function', () => {
-    const justFinalJson = {
-      'type': 'Feature',
-      'geometry': {
-        'type': 'Polygon',
-        'coordinates': [[
-          [-104.05, 78.99],
-          [-87.22,  78.98],
-          [-86.58,  75.94],
-          [-104.03, 75.94],
-          [-104.05, 78.99]
-        ]]
-      },
-    };
-
-    jsonPreview(justFinalJson, previewFunction);
-    // Confirm equal object passed
-    expect(previewFunction.mock.calls[0][0]).toEqual(justFinalJson);
-    // Confirm not the same object
-    expect(previewFunction.mock.calls[0][0]).not.toBe(justFinalJson);
-  });
 });
diff --git a/x-pack/legacy/plugins/maps/public/layers/sources/client_file_source/geojson_file_source.js b/x-pack/legacy/plugins/maps/public/layers/sources/client_file_source/geojson_file_source.js
index 34faf4b29d340..a95d587042254 100644
--- a/x-pack/legacy/plugins/maps/public/layers/sources/client_file_source/geojson_file_source.js
+++ b/x-pack/legacy/plugins/maps/public/layers/sources/client_file_source/geojson_file_source.js
@@ -107,8 +107,17 @@ export class GeojsonFileSource extends AbstractVectorSource {
   }
 
   async getGeoJsonWithMeta() {
+    const copiedPropsFeatures = this._descriptor.featureCollection.features
+      .map(feature => ({
+        type: 'Feature',
+        geometry: feature.geometry,
+        properties: feature.properties ? { ...feature.properties } : {}
+      }));
     return {
-      data: this._descriptor.featureCollection,
+      data: {
+        type: 'FeatureCollection',
+        features: copiedPropsFeatures
+      },
       meta: {}
     };
   }