复合模板(Composite Template)配置后签名标签仅首份文档显示问题

我在信封(envelope)中添加了2个复合模板(Composite Template)：其中一个复合模板包含2名收件人和1份文档，另一个复合模板包含1名收件人和1份文档，但配置后*签名标签(signature tabs)*仅在第一份文档中显示，如下图所示：

对应JSON配置如下：

"compositeTemplates": [
    {
       "document": {
        "documentBase64": "xxxx",
        "name:": "xxxx",
        "documentId":"xxx"
      },
      "inlineTemplates": [
        {
          "recipients": {
            "signers": [
              {
                "deliveryMethod": "Email",
                "email": "joao@protonmail.com",
                "idCheckConfigurationName": "SMS Auth $",
                "name": "joao da Silva",
                "recipientId": "8c5fcdce-fe94-4379-8df7-608e753db718",
                "requireIdLookup": "true",
                "roleName": "Assinante",
                "routingOrder": "1",
                "smsAuthentication": {
                  "senderProvidedNumbers": [
                    "+5546994528888"
                  ]
                },
                "status": "Created",
                "tabs": {
                  "signHereTabs": [
                    {
                      "documentId": "1878974182",
                      "recipientId": "8c5fcdce-fe94-4379-8df7-608e753db718"
                    }
                  ]
                }
              },
              {
                "deliveryMethod": "Email",
                "email": "joana@gmail.com",
                "idCheckConfigurationName": "SMS Auth $",
                "name": "Joana Silva",
                "recipientId": "11f6f9fc-c622-4d9b-9a98-4401a59cefbe",
                "requireIdLookup": "true",
                "roleName": "Testemunha",
                "routingOrder": "2",
                "smsAuthentication": {
                  "senderProvidedNumbers": [
                    "+5546994528888"
                  ]
                },
                "status": "Created",
                "tabs": {
                  "signHereTabs": [
                    {
                      "documentId": "1878974182",
                      "recipientId": "11f6f9fc-c622-4d9b-9a98-4401a59cefbe"
                    }
                  ]
                }
              }
            ]
          },
          "sequence": "2"
        }
      ],
      "serverTemplates": [
        {
          "sequence": "1",
          "templateId": "9b13a1dc-456c-4dff-87d8-ae4205dfb4eb"
        }
      ]
    },
    {
     "document": {
            "documentBase64": "xxxx",
            "name:": "xxxx",
            "documentId":"xxx"
      },
      "inlineTemplates": [
        {
          "recipients": {
            "signers": [
              {
                "deliveryMethod": "Email",
                "email": "pedro@outlook.com",
                "idCheckConfigurationName": "SMS Auth $",
                "name": "Pedro Silva",
                "recipientId": "edd53f74-3e87-4380-859a-6d1fee7c5c92",
                "requireIdLookup": "true",
                "roleName": "Assinante",
                "routingOrder": "1",
                "smsAuthentication": {
                  "senderProvidedNumbers": [
                    "+5546994528888"
                  ]
                },
                "status": "Created",
                "tabs": {
                  "signHereTabs": [
                    {
                      "documentId": "1238654318",
                      "recipientId": "edd53f74-3e87-4380-859a-6d1fee7c5c92"
                    }
                  ]
                }
              }
            ]
          },
          "sequence": "3"
        }
      ],
      "serverTemplates": [
        {
          "sequence": "2",
          "templateId": "33b13eb1-25d5-46ee-b322-af433665b369"
        }
      ]
    }
  ]
}

内容的提问来源于stack exchange，提问作者gpand