"Debug JS Remotely" is very buggy system , I have many issue with it

I use Symbol in a js file from 6 months ago , Today react-native told me

Can’t find variable: Symbol

Cannot find what?! Why you could find it yesterday?!

After hours of hard working and searching, I found that my codes works on iOS , but don't works in my and other machine (So there is no cache issue) that run-android

Suddenly I see https://medium.com/@jordan_mohi/cant-find-variable-symbol-in-react-native-782489d86bd7

OH!!! MY GOD!!!!! Debug JS Remotely !!! 😡

See also #15497 (I don't know why no body care it)

I open dev menu and press Debug JS Remotly , my code works

React Can find Symbol 😮 😲 😵 😳