悬浮按钮组开启菜单模式后、同时设置shape="square"方形，展开按钮样式错误

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Version

4.2.6

Environment

Windows 11, Chrome 135.0.7049.42, Vue 3.5.13

Reproduction link

Steps to reproduce

只需要同时设置trigger和shape="square"即可触发问题：

<a-float-button-group shape="square" trigger="click">...</a-float-button-group>

完整vue代码：

<template>
  <a-float-button-group
    shape="square"
    trigger="click"
    type="primary"
    :style="{ right: '24px' }"
  >
    <template #icon>
      <CustomerServiceOutlined />
    </template>
    <a-float-button />
    <a-float-button>
      <template #icon>
        <CommentOutlined />
      </template>
    </a-float-button>
  </a-float-button-group>
  <a-float-button-group
    shape="square"
    trigger="hover"
    type="primary"
    :style="{ right: '94px' }"
  >
    <template #icon>
      <CustomerServiceOutlined />
    </template>
    <a-float-button />
    <a-float-button>
      <template #icon>
        <CommentOutlined />
      </template>
    </a-float-button>
  </a-float-button-group>
</template>
<script lang="ts" setup>
import {
  CustomerServiceOutlined,
  CommentOutlined,
} from "@ant-design/icons-vue";
</script>

What is expected?

主按钮应该是圆角矩形。

What is actually happening?

主按钮下面两个圆角正常，上面两个变成方角。