rspecで、let, beforeのコードの順番で紐付いたモデルが取れたり取れなかったりする

api_spec.rb

let!(:user1) { create(:user, id: 1, finc_user_id: 1) }
let(:user2) { create(:user, id: 2, finc_user_id: 2) }
let(:partner_organization) { create(:partner_organization, id: 1) }
let(:partner_organization_branch) { create(:partner_organization_branch, partner_organization: partner_organization) }
let!(:partner_organization_branches_user) { create(:partner_organization_branches_user, partner_organization_branch: partner_organization_branch, user: user1) }

let(:url) { "/internal/v1/users/partner_organizations/" }
let(:params) { { finc_user_ids: finc_user_ids, application_token: Settings.wellness_survey.api.access_grant } }
before { get url, params }

だとok. ちゃんと
{"users"=>[{"id"=>1, "partner_organization_branches"=>[中身あり]}], "non_exist_users"=>[]}

api_spec.rb

let(:url) { "/internal/v1/users/partner_organizations/" }
let(:params) { { finc_user_ids: finc_user_ids, application_token: Settings.wellness_survey.api.access_grant } }
before { get url, params }

let!(:user1) { create(:user, id: 1, finc_user_id: 1) }
let(:user2) { create(:user, id: 2, finc_user_id: 2) }
let(:partner_organization) { create(:partner_organization, id: 1) }
let(:partner_organization_branch) { create(:partner_organization_branch, partner_organization: partner_organization) }
let!(:partner_organization_branches_user) { create(:partner_organization_branches_user, partner_organization_branch: partner_organization_branch, user: user1) }

{"users"=>[{"id"=>1, "partner_organization_branches"=>[中身なしblank]}], "non_exist_users"=>[]}
で紐付いたユーザが取れない

原因ググり中。