Built in react-devtools does not connect to real device

React Native Debugger app version: 0.8.1
React Native version: 0.55.4
Platform: iOS
Is real device of platform: Yes
Operating System: macOS

I have used [a snippet](https://github.com/expo/expo/issues/849#issuecomment-357455841) to set up `react-devtools` on a real device, and it works fine with a standalone version of `react-devtools`. At some point it also worked with the one built into inspector, but after some point it stopped connecting, and nothing really helps (I also tried to uninstall it using brew).

Can this be related to some cache files which are not touched by brew installation? If I can help somehow to debug this please, let me know.

The issue names no files, tests, or entry points. Start by reproducing the failure with react-native-debugger 0.8.1, React Native 0.55.4, iOS, and a real device, using the linked react-devtools setup; done means the built-in React DevTools connects successfully.

Scritto dal modello di indicizzazione a partire dal testo della issue.