React Inspector get stuck at "Connecting to React…" for RN ^0.43 (#45)
It usually on Android, the problem is related to requestIdleCallback API (try to check if it not work on debug mode).
This issue have been fixed in react-devtools-core@^2.3.0, please ensure the version is correct in your React Native project (Note that it's dependency of react-native). Feel free to file an issue if it still not working.
If you're experiencing the issue like this comment of #84, this issue have been fixed in react-devtools-core@^2.3.0, please ensure the version is correct in your React Native project (Note that it's dependency of react-native).