element ui table表格的操作列 在切换时候会导致操作列...情况解决办法

html: 
<el-table :data="taskList" border ref="fileTable" :key="tableKey">   </el-table>

　　

tableKey: 0

 handleClick() {
      this.pageNum = 1
      this.count = 0
      this.searchForm = {}
      this.tableKey++;
      this.getServiceCustomer()
    },