docs(form): update faq for scrollToFirstError (#43640)

* docs(form): update faq for scrollToFirstError

* Update components/form/index.en-US.md

Co-authored-by: afc163 <afc163@gmail.com>
Signed-off-by: xliez <xliez@foxmail.com>

---------

Signed-off-by: xliez <xliez@foxmail.com>
Co-authored-by: afc163 <afc163@gmail.com>

components/form/index.en-US.md

@@ -592,12 +592,18 @@ React can not get correct interaction of controlled component with async value u
 }
 </style>
 
-### `scrollToFirstError` and `scrollToField` not working on custom form control?
+### `scrollToFirstError` and `scrollToField` not working?
+
+1. use custom form control
 
 See similar issues: [#28370](https://github.com/ant-design/ant-design/issues/28370) [#27994](https://github.com/ant-design/ant-design/issues/27994)
 
 `scrollToFirstError` and `scrollToField` deps on `id` attribute passed to form control, please make sure that it hasn't been ignored in your custom form control. Check [codesandbox](https://codesandbox.io/s/antd-reproduction-template-forked-25nul?file=/index.js) for solution.
 
+2. multiple forms on same page
+
+If there are multiple forms on the page, and there are duplicate same `name` form item, the form scroll probably may find the form item with the same name in another form. You need to set a different `name` for the `Form` component to distinguish it.
+
 ### Continue, why not use `ref` to bind element?
 
 Form can not get real DOM node when customize component not support `ref`. It will get warning in React Strict Mode if wrap with Class Component and call `findDOMNode`. So we use `id` to locate element.

components/form/index.zh-CN.md

@@ -591,12 +591,18 @@ React 中异步更新会导致受控组件交互行为异常。当用户交互
 }
 </style>
 
-### 自定义表单控件 `scrollToFirstError` 和 `scrollToField` 失效？
+### `scrollToFirstError` 和 `scrollToField` 失效？
+
+1. 使用了自定义表单控件
 
 类似问题：[#28370](https://github.com/ant-design/ant-design/issues/28370) [#27994](https://github.com/ant-design/ant-design/issues/27994)
 
 滚动依赖于表单控件元素上绑定的 `id` 字段，如果自定义控件没有将 `id` 赋到正确的元素上，这个功能将失效。你可以参考这个 [codesandbox](https://codesandbox.io/s/antd-reproduction-template-forked-25nul?file=/index.js)。
 
+2. 页面内有多个表单
+
+页面内如果有多个表单，且存在表单项 `name` 重复，表单滚动定位可能会查找到另一个表单的同名表单项上。需要给表单 `Form` 组件设置不同的 `name` 以区分。
+
 ### 继上，为何不通过 `ref` 绑定元素？
 
 当自定义组件不支持 `ref` 时，Form 无法获取子元素真实 DOM 节点，而通过包裹 Class Component 调用 `findDOMNode` 会在 React Strict Mode 下触发警告。因而我们使用 id 来进行元素定位。