sorry. that's magic of my awful english.
as i mentioned in previous posts, when i apply external Vcc to controller and bulk caps are cherged, psu generates stable 12V until the cas are discharged. so if there is any problem in current sense or other parts, that cause restart, controller should restart not only when connected to the mains, but also when started using external voltage.
so, i think the issue, whatever it is, should be in startup circut. i checked every component from winding to the Vcc pin. everything was ok. just the winding itself remained unchecked.