In my case cold migration works if allow_resize_to_same host was set to False and fails if this option was set to True. In case when allow_resize_to_same host=False resize always moves the instance to another host.
In my case cold migration works if allow_resize_ to_same host was set to False and fails if this option was set to True. to_same host=False resize always moves the instance to another host.
In case when allow_resize_