Cloudflare App "Google Translate" disappears during loading

I’ve installed the app Google Translate on my blog Futrime’s Blog and when I preview it, all is OK. However, when I straightly access my website, the translate widget just display for less than one second and soon disappeared.

Looking it up at dev tools, I found it empty:

What’s more strange, if and only if I open Network Tab in dev tools (Tested in Firefox and Edge), it functions well. But after changing to other Tabs like Console, Performance, the bug returns.

It seems that something in the Javascript file from the app deleted the content in the widget.