supabase db pull ignores columns starting with __xxx

[softmarshmallow]

supabase db pull ignores the column starting with double underscore. is this a feature or a bug?

for Example,

remote schema:

create table grida_canvas.canvas_document (
  created_at timestamp with time zone not null default now(),
  data jsonb not null,
  id uuid not null,
  __schema_version text not null default '0.0.1-beta.1+20250303'::text,
  constraint canvas_document_pkey primary key (id),
  constraint canvas_document_id_key unique (id),
  constraint canvas_document_id_fkey foreign KEY (id) references document (id) on delete CASCADE
) TABLESPACE pg_default;

local (pulled) schema:

create table grida_canvas.canvas_document (
  created_at timestamp with time zone not null default now(),
  data jsonb not null,
  id uuid not null,
  constraint canvas_document_id_key unique (id),
  constraint canvas_document_id_fkey foreign KEY (id) references document (id) on delete CASCADE
) TABLESPACE pg_default;

the __schema_version will be ignored

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Update

when I excplicitly set supabase db pull --schema scnema_name, it will diff the changes.
but the schema is already configured in config.toml though.