解决办法：

跳转前将弹窗的flag变成false

sureJump: function() {
 var self = this;
 this.backModalFlag = false;
 this.infoModalFlag = false;
 this.warnModalFlag = false;
 setTimeout(function () {
  self.$router.push({
   name: 'activityManage',
   query: {
    id: self.$route.query.id
   },
  })
 }, 50)
},