diff --git a/packages/core/src/___internal-do-not-use-will-break-in-patch/admin-ui/pages/ListPage/index.tsx b/packages/core/src/___internal-do-not-use-will-break-in-patch/admin-ui/pages/ListPage/index.tsx
index 739eefe2cb1..158699c2b1a 100644
--- a/packages/core/src/___internal-do-not-use-will-break-in-patch/admin-ui/pages/ListPage/index.tsx
+++ b/packages/core/src/___internal-do-not-use-will-break-in-patch/admin-ui/pages/ListPage/index.tsx
@@ -26,7 +26,7 @@ import { Pagination, PaginationLabel, usePaginationParams } from '../../../../ad
 import { useList } from '../../../../admin-ui/context'
 import { GraphQLErrorNotice } from '../../../../admin-ui/components/GraphQLErrorNotice'
 import { Link, useRouter } from '../../../../admin-ui/router'
-import { RelationsSearchFields, useFilter } from '../../../../fields/types/relationship/views/RelationshipSelect'
+import { useFilter } from '../../../../fields/types/relationship/views/RelationshipSelect'
 import { CreateButtonLink } from '../../../../admin-ui/components/CreateButtonLink'
 import { FieldSelection } from './FieldSelection'
 import { FilterAdd } from './FilterAdd'
@@ -158,27 +158,10 @@ function ListPage ({ listKey }: ListPageProps) {
   const filters = useFilters(list, filterableFields)
   const searchFields = Object.keys(list.fields).filter(key => list.fields[key].search)
 
-  const relationsSearchFields: RelationsSearchFields[] = Object.keys(list.fields)
-    .map((key) => {
-      const field = list.fields[key]
-
-      // @ts-expect-error Wrong types for relationship fields
-      if (!field.fieldMeta.many !== undefined) return
-
-      return {
-        field: key,
-        // @ts-expect-error Wrong types for relationship fields
-        refSearchFields: field.fieldMeta?.refSearchFields,
-        // @ts-expect-error Wrong types for relationship fields
-        many: field.fieldMeta?.many,
-      }
-    })
-    .filter(Boolean) as RelationsSearchFields[]
-
   const searchLabels = searchFields.map(key => list.fields[key].label)
   const searchParam = typeof query.search === 'string' ? query.search : ''
   const [searchString, updateSearchString] = useState(searchParam)
-  const search = useFilter(searchParam, list, searchFields, relationsSearchFields)
+  const search = useFilter(searchParam, list, searchFields)
   const updateSearch = (value: string) => {
     const { search, ...queries } = query
 
diff --git a/packages/core/src/fields/types/relationship/views/RelationshipSelect.tsx b/packages/core/src/fields/types/relationship/views/RelationshipSelect.tsx
index b00e5b6c938..7cb18f85fa5 100644
--- a/packages/core/src/fields/types/relationship/views/RelationshipSelect.tsx
+++ b/packages/core/src/fields/types/relationship/views/RelationshipSelect.tsx
@@ -72,13 +72,7 @@ function isUuid (x: unknown) {
   return /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i.test(x)
 }
 
-export type RelationsSearchFields = {
-  field: string
-  refSearchFields: string[]
-  many: boolean
-}
-
-export function useFilter (value: string, list: ListMeta, searchFields: string[], relationsSearchFields: RelationsSearchFields[] = []) {
+export function useFilter (value: string, list: ListMeta, searchFields: string[]) {
   return useMemo(() => {
     const trimmedSearch = value.trim()
     if (!trimmedSearch.length) return { OR: [] }
@@ -104,6 +98,40 @@ export function useFilter (value: string, list: ListMeta, searchFields: string[]
 
     for (const fieldKey of searchFields) {
       const field = list.fields[fieldKey]
+
+      // @ts-expect-error TODO: fix fieldMeta type for relationship fields
+      if (field.fieldMeta?.refSearchFields) {
+        // @ts-expect-error TODO: fix fieldMeta type for relationship fields
+        for (const fieldKey of field.fieldMeta?.refSearchFields) {
+          const field = list.fields[fieldKey]
+
+          // @ts-expect-error TODO: fix fieldMeta type for relationship fields
+          if (field.fieldMeta?.many) {
+            conditions.push({
+              [fieldKey]: {
+                some: {
+                  [fieldKey]: {
+                    contains: trimmedSearch,
+                    mode: field.search === 'insensitive' ? 'insensitive' : undefined,
+                  },
+                },
+              },
+            })
+
+            continue
+          }
+
+          conditions.push({
+            [field.path]: {
+              contains: trimmedSearch,
+              mode: field.search === 'insensitive' ? 'insensitive' : undefined,
+            },
+          })
+        }
+
+        continue
+      }
+
       conditions.push({
         [field.path]: {
           contains: trimmedSearch,
@@ -112,31 +140,6 @@ export function useFilter (value: string, list: ListMeta, searchFields: string[]
       })
     }
 
-    for (const { field, refSearchFields, many } of relationsSearchFields) {
-      conditions.push(
-        ...refSearchFields.map((refSearchField) =>
-          many
-            ? {
-                [field]: {
-                  some: {
-                    [refSearchField]: {
-                      contains: trimmedSearch,
-                    },
-                  },
-                },
-              }
-            : {
-                [field]: {
-                  [refSearchField]: {
-                    contains: trimmedSearch,
-                  },
-                },
-              },
-        ),
-      )
-    }
-
-
     return { OR: conditions }
   }, [value, list, searchFields])
 }