[9.1] [Security][Timelines] Remove unstable batched updates (#234866) (#235280)

# Backport

This will backport the following commits from `main` to `9.1`:
- [[Security][Timelines] Remove unstable batched updates
(#234866)](#234866)

<!--- Backport version: 9.6.6 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sorenlouv/backport)

<!--BACKPORT
[{"author":{"name":"lgestc","email":"[email protected]"},"sourceCommit":{"committedDate":"2025-09-16T21:10:29Z","message":"[Security][Timelines]
Remove unstable batched updates (#234866)\n\n## Summary\n\nThis
functionality is now available without the unstable api uses,\nstarting
with react
18:\n\nhttps://react.dev/blog/2022/03/29/react-v18#new-feature-automatic-batching\n\n---------\n\nCo-authored-by:
kibanamachine
<[email protected]>","sha":"ed9f709ef56b182116ebcd788245fdecfdacfd8b","branchLabelMapping":{"^v9.2.0$":"main","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["chore","release_note:skip","Team:Threat
Hunting:Investigations","backport:prev-minor","v9.2.0"],"title":"[Security][Timelines]
Remove unstable batched
updates","number":234866,"url":"https://github.com/elastic/kibana/pull/234866","mergeCommit":{"message":"[Security][Timelines]
Remove unstable batched updates (#234866)\n\n## Summary\n\nThis
functionality is now available without the unstable api uses,\nstarting
with react
18:\n\nhttps://react.dev/blog/2022/03/29/react-v18#new-feature-automatic-batching\n\n---------\n\nCo-authored-by:
kibanamachine
<[email protected]>","sha":"ed9f709ef56b182116ebcd788245fdecfdacfd8b"}},"sourceBranch":"main","suggestedTargetBranches":[],"targetPullRequestStates":[{"branch":"main","label":"v9.2.0","branchLabelMappingKey":"^v9.2.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/234866","number":234866,"mergeCommit":{"message":"[Security][Timelines]
Remove unstable batched updates (#234866)\n\n## Summary\n\nThis
functionality is now available without the unstable api uses,\nstarting
with react
18:\n\nhttps://react.dev/blog/2022/03/29/react-v18#new-feature-automatic-batching\n\n---------\n\nCo-authored-by:
kibanamachine
<[email protected]>","sha":"ed9f709ef56b182116ebcd788245fdecfdacfd8b"}}]}]
BACKPORT-->

Co-authored-by: lgestc <[email protected]>

Author: kibanamachine

x-pack/solutions/security/plugins/security_solution/public/timelines/containers/details/index.tsx

@@ -7,7 +7,6 @@
 
 import { isEmpty } from 'lodash/fp';
 import { useCallback, useEffect, useRef, useState } from 'react';
-import ReactDOM from 'react-dom';
 import deepEqual from 'fast-deep-equal';
 import { Subscription } from 'rxjs';
 
@@ -90,13 +89,11 @@ export const useTimelineEventsDetails = ({
             next: (response) => {
               if (!isRunningResponse(response)) {
                 Promise.resolve().then(() => {
-                  ReactDOM.unstable_batchedUpdates(() => {
-                    setLoading(false);
-                    setTimelineDetailsResponse(response.data || []);
-                    setRawEventData(response.rawResponse.hits.hits[0]);
-                    setEcsData(response.ecs || null);
-                    searchSubscription$.current.unsubscribe();
-                  });
+                  setLoading(false);
+                  setTimelineDetailsResponse(response.data || []);
+                  setRawEventData(response.rawResponse.hits.hits[0]);
+                  setEcsData(response.ecs || null);
+                  searchSubscription$.current.unsubscribe();
                 });
               }
             },