描述问题：

inputTree组件设置数据来自外部接口或上下文变量，虽然设置了"heightAuto: true"，但是在展开某一层级后依旧是固定高度（不显示root时为266px）

截图或视频：

不展开层级

展开层级

如何复现（请务必完整填写下面内容）：

1. 你是如何使用 amis 的？

sdk

1. amis 版本是什么？请先在最新 beta 版本测试问题是否存在

6.0.0

1. 粘贴有问题的完整 amis schema 代码：

"aside": [
    {
      "type": "input-tree",
      "name": "host_tree",
      "inputClassName": "no-padder",
      "heightAuto": true,
      "submitOnChange": true,
      "selectFirst": false,
      "inputOnly": true,
      "id": "u:d3bae38125a9",
      "multiple": false,
      "enableNodePath": false,
      "hideRoot": true,
      "showIcon": true,
      "initiallyOpen": true,
      "size": "full",
      "treeContainerClassName": "",
      "onEvent": {
        "change": {
          "weight": 500,
          "actions": [
            {
              "componentId": "u:96b6923a086a",
              "ignoreError": false,
              "actionType": "reload",
              "args": {
                "resetPage": true
              },
              "data": {
                "select_tree": "${host_tree}"
              },
              "dataMergeMode": "merge"
            }
          ]
        }
      },
      "clearable": false,
      "editable": false,
      "creatable": false,
      "removable": false,
      "source": {
        "url": "http://127.0.0.1:8000/backend/assets/hosts/iplist/",
        "method": "get",
        "requestAdaptor": "",
        "adaptor": "",
        "messages": {
        },
        "dataType": "json"
      },
      "static": false,
      "hidden": false
    }
  ],

1. 操作步骤

存在children，并且children较多时展开该层级就能复现