error_page disables more_set_headers

[RekGRpth]

compare

more_set_headers "name1: value1";
location =/one {
    more_set_headers "name2: value2";
    return 303 OK;
}

and

location @error {
    return 200 OK;
}
more_set_headers "name1: value1";
location =/two {
    more_set_headers "name2: value2";
    error_page 303 = @error;
    return 303 OK;
}

if request one location, it adds two headers name1 with value1 and name2 with value2
but if request two location, it adds only one header name1 with value1