[9.1] [Discover] Fix adhoc_data_views test not updating hits count (elastic#231624) (elastic#231677)

# Backport

This will backport the following commits from `main` to `9.1`:
- [[Discover] Fix adhoc_data_views test not updating hits count
(elastic#231624)](elastic#231624)

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

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

<!--BACKPORT [{"author":{"name":"Ania
Kowalska","email":"[email protected]"},"sourceCommit":{"committedDate":"2025-08-13T17:18:49Z","message":"[Discover]
Fix adhoc_data_views test not updating hits count
(elastic#231624)","sha":"fff5a8ddc7290b48e5b8ae0b42961e9c5d718252","branchLabelMapping":{"^v9.2.0$":"main","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["release_note:skip","Team:DataDiscovery","backport:version","v9.2.0","v9.1.3","v8.19.3","v9.0.6","v8.18.6"],"title":"[Discover]
Fix adhoc_data_views test not updating hits
count","number":231624,"url":"https://github.com/elastic/kibana/pull/231624","mergeCommit":{"message":"[Discover]
Fix adhoc_data_views test not updating hits count
(elastic#231624)","sha":"fff5a8ddc7290b48e5b8ae0b42961e9c5d718252"}},"sourceBranch":"main","suggestedTargetBranches":["9.1","8.19","9.0","8.18"],"targetPullRequestStates":[{"branch":"main","label":"v9.2.0","branchLabelMappingKey":"^v9.2.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/231624","number":231624,"mergeCommit":{"message":"[Discover]
Fix adhoc_data_views test not updating hits count
(elastic#231624)","sha":"fff5a8ddc7290b48e5b8ae0b42961e9c5d718252"}},{"branch":"9.1","label":"v9.1.3","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"},{"branch":"8.19","label":"v8.19.3","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"},{"branch":"9.0","label":"v9.0.6","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"},{"branch":"8.18","label":"v8.18.6","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"}]}]
BACKPORT-->

Co-authored-by: Ania Kowalska <[email protected]>

Author: kibanamachine

src/platform/test/functional/apps/discover/group4/_adhoc_data_views.ts

@@ -105,18 +105,32 @@ export default function ({ getService, getPageObjects }: FtrProviderContext) {
         operation: 'is',
         value: 'nestedValue',
       });
+
+      await header.waitUntilLoadingHasFinished();
+      await discover.waitUntilSearchingHasFinished();
+
       expect(await filterBar.hasFilter('nestedField.child', 'nestedValue')).to.be(true);
       await retry.try(async function () {
         expect(await discover.getHitCount()).to.be('1');
       });
       await filterBar.removeFilter('nestedField.child');
 
+      await header.waitUntilLoadingHasFinished();
+      await discover.waitUntilSearchingHasFinished();
+
       await queryBar.setQuery('test');
       await queryBar.submitQuery();
+
+      await header.waitUntilLoadingHasFinished();
+      await discover.waitUntilSearchingHasFinished();
+
       await retry.try(async () => expect(await discover.getHitCount()).to.be('22'));
 
       await queryBar.clearQuery();
       await queryBar.submitQuery();
+
+      await header.waitUntilLoadingHasFinished();
+      await discover.waitUntilSearchingHasFinished();
     });
 
     it('should not update data view id when saving search first time', async () => {

x-pack/platform/test/serverless/functional/test_suites/discover/group4/_adhoc_data_views.ts

@@ -106,18 +106,32 @@ export default function ({ getService, getPageObjects }: FtrProviderContext) {
         operation: 'is',
         value: 'nestedValue',
       });
+
+      await PageObjects.header.waitUntilLoadingHasFinished();
+      await PageObjects.discover.waitUntilSearchingHasFinished();
+
       expect(await filterBar.hasFilter('nestedField.child', 'nestedValue')).to.be(true);
       await retry.try(async function () {
         expect(await PageObjects.discover.getHitCount()).to.be('1');
       });
       await filterBar.removeFilter('nestedField.child');
 
+      await PageObjects.header.waitUntilLoadingHasFinished();
+      await PageObjects.discover.waitUntilSearchingHasFinished();
+
       await queryBar.setQuery('test');
       await queryBar.submitQuery();
+
+      await PageObjects.header.waitUntilLoadingHasFinished();
+      await PageObjects.discover.waitUntilSearchingHasFinished();
+
       await retry.try(async () => expect(await PageObjects.discover.getHitCount()).to.be('22'));
 
       await queryBar.clearQuery();
       await queryBar.submitQuery();
+
+      await PageObjects.header.waitUntilLoadingHasFinished();
+      await PageObjects.discover.waitUntilSearchingHasFinished();
     });
 
     it('should not update data view id when saving search first time', async () => {