Updating an adapter after added to a group makes the group uneditable

System.ServiceModel.FaultException`1System.ServiceModel.ExceptionDetail: A group could not be found that corresponds to the provided id, '1f383ffd-89d3-437f-821e-e4873effd757' (Fault Detail is equal to An ExceptionDetail, likely created by IncludeExceptionDetailInFaults=true, whose value is: Unify.Framework.UnifyEngineException: A group could not be found that corresponds to the provided id, '1f383ffd-89d3-437f-821e-e4873effd757' at Unify.Product.IdentityBroker.GroupEngineBase`1.<>c_DisplayClassc.<GetGroup>b_b()
at Unify.Framework.ExtensionMethods.WaitOnMutex(Mutex mutex, Action work)
at Unify.Product.IdentityBroker.GroupEngineBase`1.GetGroup(Guid groupId)
at Unify.Product.IdentityBroker.GroupEngineNotifierDecorator`1.GetGroup(Guid groupId)
at Unify.Product.IdentityBroker.GroupEngineAccessorBase`2.GetGroup(Guid groupId)
at Unify.Product.IdentityBroker.IdentityServiceCollector.GetConnectorGroup(Guid id)
at SyncInvokeGetConnectorGroup(Object , Object[] , Object[] )
at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]& outputs)
at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc& rpc)
at S...).