1. 仅引入插件
2. ios从直播间点击商品进入商品详情，直播浮窗出现
3. 点击浮窗返回直播间，发现商品列表不停转圈，此时，点击界面没有任何反应，无法返回
4. 后台收到若干报错

null is not an object (evaluating 't.bottom')
https://usr/__plugin__/wx2b03c6e691cd7370/appservice.js:4086:719
https://lib/WASubContext.js:2:1101702
https://lib/WASubContext.js:2:111973
https://lib/WASubContext.js:2:1101989
r@https://lib/WASubContext.js:2:1101968
https://lib/WASubContext.js:2:1102116
https://lib/WASubContext.js:2:1816473
r@https://lib/WASubContext.js:2:1752827
https://lib/WASubContext.js:2:1753015
https://lib/WASubContext.js:2:803107
https://lib/WAServiceMainContext.js:2:252376
_@https://lib/WAServiceMainContext.js:2:78183