diff --git a/src/plugins/discover/public/utils/use_es_doc_search.ts b/src/plugins/discover/public/utils/use_es_doc_search.ts
index 27393dca72da3..c42b5447256f3 100644
--- a/src/plugins/discover/public/utils/use_es_doc_search.ts
+++ b/src/plugins/discover/public/utils/use_es_doc_search.ts
@@ -8,7 +8,7 @@
 
 import { useCallback, useEffect, useMemo, useState } from 'react';
 import type * as estypes from '@elastic/elasticsearch/lib/api/typesWithBodyKey';
-import { firstValueFrom } from 'rxjs';
+import { lastValueFrom } from 'rxjs';
 import { DataView } from '@kbn/data-views-plugin/public';
 import { DocProps } from '../application/doc/components/doc';
 import { ElasticRequestState } from '../application/doc/types';
@@ -75,7 +75,7 @@ export function useEsDocSearch({
 
   const requestData = useCallback(async () => {
     try {
-      const { rawResponse } = await firstValueFrom(
+      const { rawResponse } = await lastValueFrom(
         data.search.search({
           params: {
             index,
diff --git a/x-pack/plugins/stack_alerts/public/alert_types/es_query/expression/es_query_expression.tsx b/x-pack/plugins/stack_alerts/public/alert_types/es_query/expression/es_query_expression.tsx
index 92096ba4541c4..97bf42ca2599a 100644
--- a/x-pack/plugins/stack_alerts/public/alert_types/es_query/expression/es_query_expression.tsx
+++ b/x-pack/plugins/stack_alerts/public/alert_types/es_query/expression/es_query_expression.tsx
@@ -6,7 +6,7 @@
  */
 
 import React, { useState, Fragment, useEffect, useCallback } from 'react';
-import { firstValueFrom } from 'rxjs';
+import { lastValueFrom } from 'rxjs';
 import { i18n } from '@kbn/i18n';
 import { FormattedMessage } from '@kbn/i18n-react';
 
@@ -141,7 +141,7 @@ export const EsQueryExpression = ({
     const timeWindow = parseDuration(window);
     const parsedQuery = JSON.parse(esQuery);
     const now = Date.now();
-    const { rawResponse } = await firstValueFrom(
+    const { rawResponse } = await lastValueFrom(
       data.search.search({
         params: buildSortedEventsQuery({
           index,
diff --git a/x-pack/plugins/stack_alerts/public/alert_types/es_query/expression/search_source_expression_form.tsx b/x-pack/plugins/stack_alerts/public/alert_types/es_query/expression/search_source_expression_form.tsx
index c351a1fe04c6a..bd03babf85a0b 100644
--- a/x-pack/plugins/stack_alerts/public/alert_types/es_query/expression/search_source_expression_form.tsx
+++ b/x-pack/plugins/stack_alerts/public/alert_types/es_query/expression/search_source_expression_form.tsx
@@ -7,7 +7,7 @@
 
 import React, { Fragment, useCallback, useEffect, useMemo, useReducer, useState } from 'react';
 import deepEqual from 'fast-deep-equal';
-import { firstValueFrom } from 'rxjs';
+import { lastValueFrom } from 'rxjs';
 import { Filter } from '@kbn/es-query';
 import { FormattedMessage } from '@kbn/i18n-react';
 import { EuiSpacer, EuiTitle } from '@elastic/eui';
@@ -183,7 +183,7 @@ export const SearchSourceExpressionForm = (props: SearchSourceExpressionFormProp
       'filter',
       timeFilter ? [timeFilter, ...ruleConfiguration.filter] : ruleConfiguration.filter
     );
-    const { rawResponse } = await firstValueFrom(testSearchSource.fetch$());
+    const { rawResponse } = await lastValueFrom(testSearchSource.fetch$());
     return { nrOfDocs: totalHitsToNumber(rawResponse.hits.total), timeWindow };
   }, [searchSource, timeWindowSize, timeWindowUnit, ruleConfiguration]);