diff --git a/app/scenes/CollectionPermissions/components/InputMemberPermissionSelect.tsx b/app/scenes/CollectionPermissions/components/InputMemberPermissionSelect.tsx
index 25c82d60b..889e78a52 100644
--- a/app/scenes/CollectionPermissions/components/InputMemberPermissionSelect.tsx
+++ b/app/scenes/CollectionPermissions/components/InputMemberPermissionSelect.tsx
@@ -27,7 +27,7 @@ export default function InputMemberPermissionSelect(
           value: CollectionPermission.Admin,
         },
       ]}
-      ariaLabel={t("Permissions")}
+      ariaLabel={t("Permission")}
       labelHidden
       nude
       {...props}
diff --git a/app/scenes/CollectionPermissions/index.tsx b/app/scenes/CollectionPermissions/index.tsx
index e305f4e49..f4bf41358 100644
--- a/app/scenes/CollectionPermissions/index.tsx
+++ b/app/scenes/CollectionPermissions/index.tsx
@@ -267,8 +267,9 @@ function CollectionPermissions({ collectionId }: Props) {
           <CollectionGroupMemberListItem
             key={group.id}
             group={group}
-            collectionGroupMembership={collectionGroupMemberships.get(
-              `${group.id}-${collection.id}`
+            collectionGroupMembership={collectionGroupMemberships.find(
+              collection.id,
+              group.id
             )}
             onRemove={() => handleRemoveGroup(group)}
             onUpdate={(permission) => handleUpdateGroup(group, permission)}
@@ -285,7 +286,7 @@ function CollectionPermissions({ collectionId }: Props) {
           <MemberListItem
             key={item.id}
             user={item}
-            membership={memberships.get(`${item.id}-${collection.id}`)}
+            membership={memberships.find(collection.id, item.id)}
             canEdit={item.id !== user.id || user.isAdmin}
             onRemove={() => handleRemoveUser(item)}
             onUpdate={(permission) => handleUpdateUser(item, permission)}
diff --git a/app/stores/CollectionGroupMembershipsStore.ts b/app/stores/CollectionGroupMembershipsStore.ts
index 0b7580871..2a76e8141 100644
--- a/app/stores/CollectionGroupMembershipsStore.ts
+++ b/app/stores/CollectionGroupMembershipsStore.ts
@@ -87,4 +87,16 @@ export default class CollectionGroupMembershipsStore extends Store<CollectionGro
       }
     });
   };
+
+  /**
+   * Find a collection group membership by collectionId and groupId
+   *
+   * @param collectionId The collection ID
+   * @param groupId The group ID
+   * @returns The collection group membership or undefined if not found.
+   */
+  find = (collectionId: string, groupId: string) =>
+    Array.from(this.data.values()).find(
+      (m) => m.groupId === groupId && m.collectionId === collectionId
+    );
 }
diff --git a/app/stores/MembershipsStore.ts b/app/stores/MembershipsStore.ts
index 24adf8f15..103f08c25 100644
--- a/app/stores/MembershipsStore.ts
+++ b/app/stores/MembershipsStore.ts
@@ -91,11 +91,21 @@ export default class MembershipsStore extends Store<Membership> {
     collectionId: string;
     userId: string;
   }) => {
-    const membership = Array.from(this.data.values()).find(
-      (m) => m.userId === userId && m.collectionId === collectionId
-    );
+    const membership = this.find(collectionId, userId);
     if (membership) {
       this.remove(membership.id);
     }
   };
+
+  /**
+   * Find a collection user membership by collectionId and userId
+   *
+   * @param collectionId The collection ID
+   * @param userId The user ID
+   * @returns The collection user membership or undefined if not found.
+   */
+  find = (collectionId: string, userId: string) =>
+    Array.from(this.data.values()).find(
+      (m) => m.userId === userId && m.collectionId === collectionId
+    );
 }
diff --git a/shared/i18n/locales/en_US/translation.json b/shared/i18n/locales/en_US/translation.json
index 960caa9c8..d060f3054 100644
--- a/shared/i18n/locales/en_US/translation.json
+++ b/shared/i18n/locales/en_US/translation.json
@@ -471,6 +471,7 @@
   "Search people": "Search people",
   "No people matching your search": "No people matching your search",
   "No people left to add": "No people left to add",
+  "Permission": "Permission",
   "Active <1></1> ago": "Active <1></1> ago",
   "Never signed in": "Never signed in",
   "Invited": "Invited",