It seems that the domain doesn't work with widget mail_thread , it's normal ?

it's the same thing if i create a function field with message filtering

'personal_msg_ids': fields.function(_personal_message, relation='mail.message', type='one2many',string="Personal message"),

the personal_message function return {'1';[1,2]} but if I use the widget it display all messages for the corresponding model and res_id I have tested without widget and only 2 message are displayed (like I want)