firebase.auth() hangs when chrome debugging is on - firebase

Question

Using the same credentials the login login action hangs at firebase.auth() when chrome debug is on. It hangs until I tap on the screen. Only then the login proceeds.
As soon as I turn chrome debug off, the login action incl. firebase.auth() runs as fast as expected.
here is my package.json an the affected action:
Action:
export const loginUser = ({ email, password }) => (dispatch) => {
dispatch({ type: LOGIN_USER });
return firebase
.auth()
.signInWithEmailAndPassword(email, password)
.then((user) => {
setTimeout(() => null, 0);
dispatch(() => saveCredentials(email, password))
.then(dispatch(loginUserSuccess(user)))
.then(dispatch(weekplanFetch()))
.then(dispatch(recipeLibraryFetch()))
.then(() => {
NavigationService.navigate('Home');
});
})
.catch((error) => {
console.log(`sign in fail ${error}`);
return firebase
.auth()
.createUserWithEmailAndPassword(email, password)
.then((user) => {
dispatch(() => saveCredentials(email, password))
.then(dispatch(loginUserSuccess(user)))
.then(dispatch(initWeekplan()))
.then(dispatch(initRecipeLibrary()))
.then(() => {
NavigationService.navigate('Home');
});
})
.catch((userCreateFail) => {
// console.log(`user create fail ${userCreateFail}`);
dispatch(loginUserFail(userCreateFail.message));
});
});
};
package.json
{
"name": "WhatsForDinner",
"version": "1.0.5",
"private": true,
"scripts": {
"start": "node node_modules/react-native/local-cli/cli.js start",
"test": "jest",
"ios:beta": "(cd ios/ && bundle exec fastlane beta)",
"ios:commit": "cd ios/ && bundle exec fastlane commit",
"lint": "eslint .",
"lint:fix": "eslint . --fix",
"prettier": "prettier --write '*.js'",
"format-code": "yarn run prettier && yarn run lint:fix",
"precommit": "lint-staged",
"test:coverage": "jest --coverage && open coverage/lcov-report/index.html"
},
"lint-staged": {
"*.js": [
"yarn run format-code",
"git add",
"jest --bail --findRelatedTests --coverage"
]
},
"dependencies": {
"firebase": "^5.8.6",
"prop-types": "^15.6.0",
"react": "16.6.3",
"react-native": "0.57.8",
"react-native-code-push": "^5.5.2",
"react-native-image-picker": "^0.28.0",
"react-native-keychain": "^3.0.0",
"react-native-paper": "^1.12.0",
"react-native-vector-icons": "^6.4.1",
"react-navigation": "^1.6.1",
"react-redux": "^5.0.7",
"redux": "^3.7.2",
"redux-logger": "^3.0.6",
"redux-thunk": "^2.3.0",
"yarn": "^1.9.4"
},
"devDependencies": {
"babel-eslint": "^8.2.2",
"babel-jest": "^23.4.2",
"babel-preset-react-native": "^5",
"enzyme": "^3.7.0",
"enzyme-adapter-react-16": "^1.6.0",
"eslint": "^4.18.1",
"eslint-config-airbnb": "^16.1.0",
"eslint-plugin-import": "^2.7.0",
"eslint-plugin-jsx-a11y": "^6.0.3",
"eslint-plugin-react": "^7.12.3",
"husky": "^0.14.3",
"jest": "22.4.2",
"jest-fetch-mock": "^2.1.0",
"lint-staged": "^7.2.2",
"prettier": "1.10.2",
"react-dom": "^16.7.0",
"react-test-renderer": "16.4.1",
"redux-mock-store": "^1.5.3"
},
"jest": {
"preset": "react-native",
"setupFiles": [
"<rootDir>/tests/setup.js"
],
"transform": {
"^.+\\.js$": "<rootDir>/node_modules/react-native/jest/preprocessor.js"
},
"collectCoverageFrom": [
"app/**/*.js",
"!app/components/index.js"
],
"transformIgnorePatterns": [
"node_modules/(?!(jest-)?react-native|react-navigation)"
]
}
}