一个测试脚本中mock2次组件的返回结果，第二次报‘’小程序接口出错，错误代码500‘’？

调用的js： wx.showActionSheet({
      itemList: that.data.empList,
      success: function (res) {
        var empListIdS = that.data.empListIdS,
          bind_Id = empListIdS[res.tapIndex];
        wx.showModal({
          content: '您确定要切换工号为' + that.data.empList[res.tapIndex] + '为技师吗?',
          success: function (res1) {
            console.log(res1)
            if (res1.confirm) {
              that.setData({
                bind_Id: bind_Id
              });
              that.getEmplInfo();
            }
          }
        });
      }
    })
  }
脚本中的第一个mock：
    let setshowModal_list = '';
    let showActionSheet_content = '';
    await miniProgram.exposeFunction('setshowModal', function (item) {
        setshowModal_list = item
    })
    await miniProgram.exposeFunction('setshowActionSheet', function (item1) {
        showActionSheet_content = item1
    })
    await miniProgram.mockWxMethod('showActionSheet', function (obj) {
        setshowActionSheet(obj.itemList)
        return { tapIndex: 1 }
    })
    await miniProgram.mockWxMethod('showModal', function (obj){
        setshowModal(obj.content)
        return{confirm:true,
            cancel:false}
    })
    await miniProgram.restoreWxMethod('showActionSheet')
    await miniProgram.restoreWxMethod('showModal')
    await employee_page.waitFor(3000)
脚本中的第二个mock：
    let setshowModal_performancesum = '';
    let showActionSheet_list_performancesum= '';
    await miniProgram.exposeFunction('setshowModal_performancesum', function (content) {
        setshowModal_performancesum = content
    })
    await miniProgram.exposeFunction('setshowActionSheet_per', function (itemList) {
        showActionSheet_list_performancesum = itemList
    })
    await miniProgram.mockWxMethod('showActionSheet', function (obj1) {
        console.log('调用showActionSheet组件返回列表',obj1.itemList)
        setshowActionSheet_per(obj1.itemList)
        return { tapIndex: 1 }
    })
    await miniProgram.mockWxMethod('showModal', function (obj) {
        console.log('调用showModal组件0000000000000000000000000000000')
        setshowModal_performancesum(obj.content)
        return{confirm:true,
            cancel:false}
    })
    await miniProgram.restoreWxMethod('showActionSheet')
    await miniProgram.restoreWxMethod('showModal')
第二个mock方法内的log信息均未打印，showActionSheet_list_performancesum值正常打印，setshowModal_performancesum的值为'小程序接口出错，
错误代码500'；第一次mock正常执行