DropdownMenu 组件下拉展示失效

[NEVERGIVEUP0922]

DropdownMenu 组件下拉，在浏览器或者部分手机端后台放置一段时间，展示会失效

    <h3>
      <!-- 状态 -->
      <van-dropdown-menu
        active-color="#FF2D5D"
        :class="'dropdown-menu-actived'"
      >
        <van-dropdown-item
          :title="statusMenuTitle"
          v-model="currentStatus"
          :options="allstatus"
          @change="selectOrderStatus"
        />
      </van-dropdown-menu>
      <!-- 选人 -->
      <van-dropdown-menu
        :overlay="false"
        :class="saleManName != '全部' ? 'dropdown-menu-actived' : ''"
      >
        <van-dropdown-item
          :title="saleManName"
          ref="selectBdItem"
          @opened="showSalesMenOption"
        />
      </van-dropdown-menu>
      <!-- 订单 -->
      <van-dropdown-menu
        active-color="#FF2D5D"
        :class="currentSaleType != 0 ? 'dropdown-menu-actived' : ''"
      >
        <van-dropdown-item
          v-model="currentSaleType"
          :options="saleTypes"
          @change="selectSaleTypes"
        />
      </van-dropdown-menu>
    </h3>

[nbollard4]

Hello