Update a user highest role when removed from group

If a user is removed from a group, their highest role should
be recalculated and updated

Changelog: fixed

app/models/member.rb

@@ -439,7 +439,7 @@ class Member < ApplicationRecord
   def update_highest_role?
     return unless user_id.present?
 
-    previous_changes[:access_level].present?
+    previous_changes[:access_level].present? || destroyed?
   end
 
   def update_highest_role_attribute

spec/models/member_spec.rb

@@ -706,7 +706,8 @@ RSpec.describe Member do
   end
 
   context 'when after_commit :update_highest_role' do
-    let!(:user) { create(:user) }
+    let_it_be(:user) { create(:user) }
+
     let(:user_id) { user.id }
 
     where(:member_type, :source_type) do
@@ -741,7 +742,7 @@ RSpec.describe Member do
         end
 
         describe 'destroy member' do
-          subject { member.destroy! }
+          subject { member.reload.destroy! }
 
           include_examples 'update highest role with exclusive lease'
         end