diff --git a/src/plugins/discover/public/application/angular/context/api/context.ts b/src/plugins/discover/public/application/angular/context/api/context.ts
index 44a420da8303c..cd81ca7b216b2 100644
--- a/src/plugins/discover/public/application/angular/context/api/context.ts
+++ b/src/plugins/discover/public/application/angular/context/api/context.ts
@@ -17,11 +17,17 @@ import { getEsQuerySort } from './utils/get_es_query_sort';
 import { getServices } from '../../../../kibana_services';
 
 export type SurrDocType = 'successors' | 'predecessors';
-export type EsHitRecord = Required<estypes.SearchResponse['hits']['hits'][number]> & {
-  sort: Array<number | string>;
-  _source: Record<string, string | number>;
+export type EsHitRecord = Required<
+  Pick<
+    estypes.SearchResponse['hits']['hits'][number],
+    '_id' | 'fields' | 'sort' | '_index' | '_version'
+  >
+> & {
+  _source?: Record<string, unknown>;
+  _score?: number;
   isAnchor?: boolean;
 };
+
 export type EsHitRecordList = EsHitRecord[];
 
 const DAY_MILLIS = 24 * 60 * 60 * 1000;
diff --git a/src/plugins/discover/public/application/angular/context/api/utils/get_es_query_search_after.ts b/src/plugins/discover/public/application/angular/context/api/utils/get_es_query_search_after.ts
index 1f745ab1b728e..c703abaf2e523 100644
--- a/src/plugins/discover/public/application/angular/context/api/utils/get_es_query_search_after.ts
+++ b/src/plugins/discover/public/application/angular/context/api/utils/get_es_query_search_after.ts
@@ -28,23 +28,23 @@ export function getEsQuerySearchAfter(
     // already surrounding docs -> first or last record  is used
     const afterTimeRecIdx = type === 'successors' && documents.length ? documents.length - 1 : 0;
     const afterTimeDoc = documents[afterTimeRecIdx];
-    let afterTimeValue = afterTimeDoc.sort[0];
+    let afterTimeValue = afterTimeDoc.sort[0] as string | number;
     if (nanoSeconds) {
       afterTimeValue = useNewFieldsApi
         ? afterTimeDoc.fields[timeFieldName][0]
-        : afterTimeDoc._source[timeFieldName];
+        : afterTimeDoc._source?.[timeFieldName];
     }
-    return [afterTimeValue, afterTimeDoc.sort[1]];
+    return [afterTimeValue, afterTimeDoc.sort[1] as string | number];
   }
   // if data_nanos adapt timestamp value for sorting, since numeric value was rounded by browser
   // ES search_after also works when number is provided as string
   const searchAfter = new Array(2) as EsQuerySearchAfter;
-  searchAfter[0] = anchor.sort[0];
+  searchAfter[0] = anchor.sort[0] as string | number;
   if (nanoSeconds) {
     searchAfter[0] = useNewFieldsApi
       ? anchor.fields[timeFieldName][0]
-      : anchor._source[timeFieldName];
+      : anchor._source?.[timeFieldName];
   }
-  searchAfter[1] = anchor.sort[1];
+  searchAfter[1] = anchor.sort[1] as string | number;
   return searchAfter;
 }
diff --git a/src/plugins/discover/public/application/angular/context/query_parameters/actions.test.ts b/src/plugins/discover/public/application/angular/context/query_parameters/actions.test.ts
index 83e44a5040fae..fac3e1ea6fad6 100644
--- a/src/plugins/discover/public/application/angular/context/query_parameters/actions.test.ts
+++ b/src/plugins/discover/public/application/angular/context/query_parameters/actions.test.ts
@@ -10,6 +10,7 @@ import { getQueryParameterActions } from './actions';
 import { FilterManager, SortDirection } from '../../../../../../data/public';
 import { coreMock } from '../../../../../../../core/public/mocks';
 import { ContextAppState, LoadingStatus, QueryParameters } from '../../context_app_state';
+import { EsHitRecord } from '../api/context';
 const setupMock = coreMock.createSetup();
 
 let state: ContextAppState;
@@ -39,7 +40,7 @@ beforeEach(() => {
     },
     rows: {
       all: [],
-      anchor: { isAnchor: true, fields: [], sort: [], _source: [], _id: '' },
+      anchor: ({ isAnchor: true, fields: [], sort: [], _id: '' } as unknown) as EsHitRecord,
       predecessors: [],
       successors: [],
     },