CerException when saving an incomplete entity

This is a no wellknown thing but it works well for some use cases: create a partial node form with only some fields attached and save. Only attached fields will be saved, others ignored.

What worls just file without CER, lest CER throw if the field is not present.:

CerException: Cannot create invalid reference to remote entity. in CerHandler->reference() (line 267 of /var/www/virtual/jenn/html/sites/all/modules/cer/handler.inc). Backtrace:
CerHandler->reference(Object) handler.inc:174
CerHandler->insert() handler.inc:194
CerHandler->update() 
call_user_func(Array) cer.module:233
cer_processing_entity('update', Object, 'node') cer.module:141
cer_entity_update(Object, 'node') 
call_user_func_array('cer_entity_update', Array) module.inc:857
module_invoke_all('entity_update', Object, 'node') node.module:1134
node_save(Object) node.pages.inc:413
node_form_submit(Array, Array) form.inc:1464
form_execute_handlers('submit', Array, Array) form.inc:860
drupal_process_form('registration_node_form', Array, Array) form.inc:374
drupal_build_form('registration_node_form', Array) node_edit_form.inc:70
ctools_context_create_node_edit_form(, Object, , Array) context.inc:600
ctools_context_create('node_edit_form', Object) node_edit.inc:36
ctools_node_edit_context(Object, Array, ) context.inc:796
ctools_context_get_context_from_argument(Array, Object) context.inc:852
ctools_context_get_context_from_arguments(Array, Array, Array) context-task-handler.inc:333
ctools_context_handler_get_task_contexts(Array, '', Array) node_edit.inc:92
page_manager_node_edit(Object) 
call_user_func_array('page_manager_node_edit', Array) menu.inc:517
menu_execute_active_handler() index.php:21

It would be great when Cer can handle that use case.