diff --git a/x-pack/plugins/ingest_pipelines/public/application/components/pipeline_editor/__jest__/processors/grok.test.ts b/x-pack/plugins/ingest_pipelines/public/application/components/pipeline_editor/__jest__/processors/grok.test.ts
index 01b4cedf82536..90ea4ed1a0105 100644
--- a/x-pack/plugins/ingest_pipelines/public/application/components/pipeline_editor/__jest__/processors/grok.test.ts
+++ b/x-pack/plugins/ingest_pipelines/public/application/components/pipeline_editor/__jest__/processors/grok.test.ts
@@ -104,4 +104,26 @@ describe('Processor: Grok', () => {
       patterns: ['pattern1', 'pattern2', 'pattern3'],
     });
   });
+
+  test('accepts grok pattern that contains escaped characters', async () => {
+    const {
+      actions: { saveNewProcessor },
+      form,
+    } = testBed;
+
+    // Add "field" value
+    form.setInputValue('fieldNameField.input', 'test_grok_processor');
+
+    // Add the escaped value of \[%{HTTPDATE:timestamp}\]%{SPACE}\"%{WORD:http_method}%{SPACE}HTTP/%{NUMBER:http_version}\"
+    const escapedValue =
+      '\\[%{HTTPDATE:timestamp}\\]%{SPACE}\\"%{WORD:http_method}%{SPACE}HTTP/%{NUMBER:http_version}\\"';
+    form.setInputValue('droppableList.input-0', escapedValue);
+
+    // Save the field
+    await saveNewProcessor();
+
+    const processors = getProcessorValue(onUpdate, GROK_TYPE);
+
+    expect(processors[0][GROK_TYPE].patterns).toEqual([escapedValue]);
+  });
 });
diff --git a/x-pack/plugins/ingest_pipelines/public/application/components/pipeline_editor/components/processor_form/processor_form.container.tsx b/x-pack/plugins/ingest_pipelines/public/application/components/pipeline_editor/components/processor_form/processor_form.container.tsx
index cce473ec9a214..ff34c88a7179e 100644
--- a/x-pack/plugins/ingest_pipelines/public/application/components/pipeline_editor/components/processor_form/processor_form.container.tsx
+++ b/x-pack/plugins/ingest_pipelines/public/application/components/pipeline_editor/components/processor_form/processor_form.container.tsx
@@ -105,7 +105,6 @@ export const ProcessorFormContainer: FunctionComponent<Props> = ({
 
       if (isValid) {
         const { type, fields: options } = data as FormData;
-
         unsavedFormState.current = options;
 
         onSubmit({
diff --git a/x-pack/plugins/ingest_pipelines/public/application/components/pipeline_editor/components/processor_form/processors/grok.tsx b/x-pack/plugins/ingest_pipelines/public/application/components/pipeline_editor/components/processor_form/processors/grok.tsx
index ae2d341c58c30..d01ae887a89da 100644
--- a/x-pack/plugins/ingest_pipelines/public/application/components/pipeline_editor/components/processor_form/processors/grok.tsx
+++ b/x-pack/plugins/ingest_pipelines/public/application/components/pipeline_editor/components/processor_form/processors/grok.tsx
@@ -5,7 +5,6 @@
  * 2.0.
  */
 
-import { flow } from 'lodash';
 import React, { FunctionComponent } from 'react';
 import { i18n } from '@kbn/i18n';
 
@@ -23,7 +22,7 @@ import { XJsonEditor, DragAndDropTextList } from '../field_components';
 
 import { FieldNameField } from './common_fields/field_name_field';
 import { IgnoreMissingField } from './common_fields/ignore_missing_field';
-import { FieldsConfig, to, from, EDITOR_PX_HEIGHT, isJSONStringValidator } from './shared';
+import { FieldsConfig, to, from, EDITOR_PX_HEIGHT } from './shared';
 
 const { isJsonField, emptyField } = fieldValidators;
 
@@ -49,7 +48,6 @@ const patternsValidation: ValidationFunc<any, string, ArrayItem[]> = ({ value, f
 
 const patternValidations: Array<ValidationFunc<any, string, string>> = [
   emptyField(valueRequiredMessage),
-  isJSONStringValidator,
 ];
 
 const fieldsConfig: FieldsConfig = {
@@ -58,8 +56,7 @@ const fieldsConfig: FieldsConfig = {
     label: i18n.translate('xpack.ingestPipelines.pipelineEditor.grokForm.patternsFieldLabel', {
       defaultMessage: 'Patterns',
     }),
-    deserializer: flow(String, to.escapeBackslashes),
-    serializer: from.unescapeBackslashes,
+    deserializer: String,
     helpText: i18n.translate('xpack.ingestPipelines.pipelineEditor.grokForm.patternsHelpText', {
       defaultMessage:
         'Grok expressions used to match and extract named capture groups. Uses the first matching expression.',