跳转到某个访问过的页面时，无法取到url参数，感觉是被缓存住了

router:

onHide: "/pages/search/search?keyword=ex%20culpa.onHide"
onReady: "/pages/search/search?keyword=ex%20culpa.onReady"
onShow: "/pages/search/search?keyword=ex%20culpa.onShow"
params: undefined
path: ""

相关环境：
taro3.0.2
vue
h5

taro3.0.0 h5 vueJS：

import { getCurrentInstance } from '@tarojs/taro'

onShow() {
console.log('query', getCurrentInstance().router)
}

报错：
TypeError: tarojs_taro__WEBPACK_IMPORTED_MODULE_2_.default.getCurrentInstance is not a function