diff --git a/opencti-platform/opencti-front/src/utils/filters/useSearchEntities.tsx b/opencti-platform/opencti-front/src/utils/filters/useSearchEntities.tsx
index 043afe133bb2..753b6f51a03d 100644
--- a/opencti-platform/opencti-front/src/utils/filters/useSearchEntities.tsx
+++ b/opencti-platform/opencti-front/src/utils/filters/useSearchEntities.tsx
@@ -670,7 +670,7 @@ const useSearchEntities = ({
         case 'fromTypes':
         case 'toTypes':
         case 'type':
-          if (
+          if ( // case not abstract types
             availableEntityTypes
             && !availableEntityTypes.includes('Stix-Cyber-Observable')
             && !availableEntityTypes.includes('Stix-Domain-Object')
@@ -694,8 +694,9 @@ const useSearchEntities = ({
               }))
               .sort((a, b) => a.label.localeCompare(b.label));
             unionSetEntities(filterKey, entitiesTypes);
-          } else {
+          } else { // case abstract types
             let result = [] as EntityWithLabelValue[];
+            // push the observables
             if (
               !availableEntityTypes
               || availableEntityTypes.includes('Stix-Core-Object')
@@ -715,6 +716,7 @@ const useSearchEntities = ({
                 },
               ];
             }
+            // push the stix domain objects
             if (
               !availableEntityTypes
               || availableEntityTypes.includes('Stix-Core-Object')
@@ -734,6 +736,7 @@ const useSearchEntities = ({
                 ...result,
               ];
             }
+            // push the relationship types
             if (
               !availableEntityTypes
               || availableEntityTypes.includes('stix-core-relationship')
diff --git a/opencti-platform/opencti-front/tests_e2e/filters/addFilter.spec.ts b/opencti-platform/opencti-front/tests_e2e/filters/addFilter.spec.ts
new file mode 100644
index 000000000000..e2b608c72236
--- /dev/null
+++ b/opencti-platform/opencti-front/tests_e2e/filters/addFilter.spec.ts
@@ -0,0 +1,12 @@
+import { expect, test } from "../fixtures/baseFixtures";
+import { FiltersUtils } from '../model/filters.pageModel';
+
+test('Add a new filter in the observables list and check the filter is still present when we come back to the page', async ({ page }) => {
+  await page.goto('/dashboard/observations/observables');
+  const filterUtils = new FiltersUtils(page);
+  await filterUtils.addFilter('Entity type', 'Artifact');
+  await expect(page.getByRole('button', { name: 'Entity type = Artifact' })).toBeVisible();
+  await page.goto('/dashboard/');
+  await page.goto('/dashboard/observations/observables');
+  await expect(page.getByRole('button', { name: 'Entity type = Artifact' })).toBeVisible();
+});
\ No newline at end of file
diff --git a/opencti-platform/opencti-front/tests_e2e/model/filters.pageModel.ts b/opencti-platform/opencti-front/tests_e2e/model/filters.pageModel.ts
new file mode 100644
index 000000000000..04139def004a
--- /dev/null
+++ b/opencti-platform/opencti-front/tests_e2e/model/filters.pageModel.ts
@@ -0,0 +1,14 @@
+import { Page } from '@playwright/test';
+
+export class FiltersUtils {
+  constructor(private page: Page) {
+  }
+  async addFilter(filterKey: string, filterLabel: string) {
+    await this.page.getByLabel('Add filter').click();
+    await this.page.getByRole('option', { name: filterKey }).click();
+    await this.page.getByLabel(filterKey).click();
+    await this.page.getByLabel(filterLabel).getByRole('checkbox').check();
+    await this.page.locator('.MuiPopover-root > .MuiBackdrop-root').click();
+  }
+  
+}
diff --git a/opencti-platform/opencti-graphql/src/domain/filterKeysSchema.ts b/opencti-platform/opencti-graphql/src/domain/filterKeysSchema.ts
index 228d19cacc38..b47705de5ce4 100644
--- a/opencti-platform/opencti-graphql/src/domain/filterKeysSchema.ts
+++ b/opencti-platform/opencti-graphql/src/domain/filterKeysSchema.ts
@@ -198,12 +198,7 @@ const completeFilterDefinitionMapWithSpecialKeys = (
   type: string,
   filterDefinitionsMap: Map<string, FilterDefinition>, // filter definition map to complete
   subEntityTypes: string[],
-  isNotEnterpriseEdition: boolean,
 ) => {
-  // Entity type (only available for abstract entity types)
-  if (!isAbstract(type) && !isBasicRelationship(type)) {
-    filterDefinitionsMap.delete(TYPE_FILTER);
-  }
   if (isStixCoreObject(type)) {
     // In regards of (exist relationship of the given relationship types for the given entities)
     filterDefinitionsMap.set(INSTANCE_REGARDING_OF, {
@@ -263,10 +258,6 @@ const completeFilterDefinitionMapWithSpecialKeys = (
         elementsForFilterValuesSearch: [ENTITY_TYPE_STATUS_TEMPLATE],
       });
     }
-    // Shared with (remove if not EE)
-    if (isNotEnterpriseEdition) {
-      filterDefinitionsMap.delete(INPUT_GRANTED_REFS);
-    }
   }
   if (type === ENTITY_TYPE_HISTORY) {
     // add context filters
@@ -346,13 +337,24 @@ const completeFilterDefinitionMapWithSpecialKeys = (
   }
 };
 
-const completeFilterDefinitionsMapForTypeAndSubtypes = (filterDefinitionsMap: Map<string, FilterDefinition>, type: string, isNotEnterpriseEdition: boolean) => {
+const handleRemoveSpecialKeysFromFilterDefinitionsMap = (filterDefinitionsMap: Map<string, FilterDefinition>, type: string, isNotEnterpriseEdition: boolean) => {
+  // Shared with (remove if not EE)
+  if (isNotEnterpriseEdition) {
+    filterDefinitionsMap.delete(INPUT_GRANTED_REFS);
+  }
+  // Entity type (only available for abstract entity types)
+  if (!isAbstract(type) && !isBasicRelationship(type)) {
+    filterDefinitionsMap.delete(TYPE_FILTER);
+  }
+};
+
+const completeFilterDefinitionsMapForTypeAndSubtypes = (filterDefinitionsMap: Map<string, FilterDefinition>, type: string) => {
   const subTypes = schemaTypesDefinition.hasChildren(type) ? schemaTypesDefinition.get(type) : []; // fetch the subtypes
   completeFilterDefinitionMapForType(filterDefinitionsMap, type, subTypes); // add attributes and relations refs of type
-  completeFilterDefinitionMapWithSpecialKeys(type, filterDefinitionsMap, subTypes.concat([type]), isNotEnterpriseEdition); // add or remove some special keys
+  completeFilterDefinitionMapWithSpecialKeys(type, filterDefinitionsMap, subTypes.concat([type])); // add or remove some special keys
   if (subTypes.length > 0) { // handle the filter definitions of the subtypes
     subTypes.forEach((subType) => {
-      completeFilterDefinitionsMapForTypeAndSubtypes(filterDefinitionsMap, subType, isNotEnterpriseEdition);
+      completeFilterDefinitionsMapForTypeAndSubtypes(filterDefinitionsMap, subType);
     });
   }
 };
@@ -366,7 +368,8 @@ export const generateFilterKeysSchema = async () => {
   const registeredTypes = schemaAttributesDefinition.getRegisteredTypes();
   registeredTypes.forEach((type) => {
     const filterDefinitionsMap: Map<string, FilterDefinition> = new Map(); // map that will contain the filterKeys schema for the entity type
-    completeFilterDefinitionsMapForTypeAndSubtypes(filterDefinitionsMap, type, isNotEnterpriseEdition);
+    completeFilterDefinitionsMapForTypeAndSubtypes(filterDefinitionsMap, type);
+    handleRemoveSpecialKeysFromFilterDefinitionsMap(filterDefinitionsMap, type, isNotEnterpriseEdition);
     filterKeysSchema.set(type, filterDefinitionsMap);
   });
   // B. add connectedToId special key (for instance triggers)
diff --git a/opencti-platform/opencti-graphql/tests/01-unit/domain/filterKeysSchema-test.ts b/opencti-platform/opencti-graphql/tests/01-unit/domain/filterKeysSchema-test.ts
index 6e646881303b..63de0a2f1ca1 100644
--- a/opencti-platform/opencti-graphql/tests/01-unit/domain/filterKeysSchema-test.ts
+++ b/opencti-platform/opencti-graphql/tests/01-unit/domain/filterKeysSchema-test.ts
@@ -16,7 +16,7 @@ import { ENTITY_TYPE_NOTIFICATION, ENTITY_TYPE_TRIGGER } from '../../../src/modu
 import { ENTITY_HASHED_OBSERVABLE_ARTIFACT, ENTITY_HASHED_OBSERVABLE_STIX_FILE, ENTITY_HASHED_OBSERVABLE_X509_CERTIFICATE } from '../../../src/schema/stixCyberObservable';
 import { ENTITY_TYPE_CONTAINER_CASE } from '../../../src/modules/case/case-types';
 import { ENTITY_TYPE_CONTAINER_GROUPING } from '../../../src/modules/grouping/grouping-types';
-import { ALIAS_FILTER, CONNECTED_TO_INSTANCE_FILTER, CONTEXT_OBJECT_LABEL_FILTER, INSTANCE_REGARDING_OF } from '../../../src/utils/filtering/filtering-constants';
+import { ALIAS_FILTER, CONNECTED_TO_INSTANCE_FILTER, CONTEXT_OBJECT_LABEL_FILTER, INSTANCE_REGARDING_OF, TYPE_FILTER } from '../../../src/utils/filtering/filtering-constants';
 import { ENTITY_TYPE_HISTORY } from '../../../src/schema/internalObject';
 
 describe('Filter keys schema generation testing', async () => {
@@ -156,6 +156,13 @@ describe('Filter keys schema generation testing', async () => {
     expect(filterDefinition?.multiple).toEqual(true);
     expect(filterDefinition?.elementsForFilterValuesSearch.length).toEqual(1);
     expect(filterDefinition?.elementsForFilterValuesSearch[0]).toEqual(ABSTRACT_STIX_CORE_OBJECT);
+    // 'entity_type' filter for abstract types only
+    filterDefinition = filterKeysSchema.get(ABSTRACT_STIX_CORE_OBJECT)?.get(TYPE_FILTER);
+    expect(filterDefinition?.type).toEqual('string');
+    filterDefinition = filterKeysSchema.get(ABSTRACT_STIX_CYBER_OBSERVABLE)?.get(TYPE_FILTER);
+    expect(filterDefinition?.type).toEqual('string');
+    filterDefinition = filterKeysSchema.get(ENTITY_TYPE_MALWARE)?.get(TYPE_FILTER);
+    expect(filterDefinition).toBeUndefined();
   });
   it('should construct correct filter definition for abstract entity types', () => {
     // Containers