parcel: 🐛 `parcel watch` in 1.5.0 stuck on "Building someFile.js..."

I tried updating my project from parcel-bundler 1.4.1 to 1.5.0, but parcel watch doesn’t finish. I removed the cache folder manually and started the watch command (see exact CLI command below). It gets stuck at some random file, displaying ∞ Building someFile.js... forever.

The parcel build command works btw.

🎛 Configuration (.babelrc, package.json, cli command)

.babelrc:

{
  "presets": ["env", "es2015", "react"],
  "plugins": [
    "transform-class-properties",
    "transform-object-rest-spread",
    "transform-decorators-legacy",
    "transform-es3-member-expression-literals",
    "transform-es3-property-literals"
  ],
  "env": {
    "production": {
      "plugins": ["transform-remove-debugger", "transform-remove-console"]
    }
  }
}

package.json (without name etc. but all deps & scripts):

{
  "dependencies": {
    "animate.css": "^3.5.2",
    "babel-polyfill": "^6.26.0",
    "flag-icon-css": "^2.8.0",
    "immer": "^0.3.0",
    "lodash": "^4.17.4",
    "material-ui": "^1.0.0-beta.12",
    "material-ui-icons": "^1.0.0-beta.10",
    "object.values": "^1.0.4",
    "pubsub-js": "^1.5.7",
    "rc-collapse": "^1.7.6",
    "react": "16.2.0",
    "react-dom": "16.2.0",
    "react-json-view": "^1.13.0",
    "react-onclickoutside": "^6.4.0",
    "react-redux": "5.0.6",
    "react-treebeard": "^2.0.3",
    "redux": "3.7.2",
    "redux-saga": "^0.15.6",
    "redux-thunk": "^2.2.0",
    "reselect": "^3.0.1",
    "workerize": "^0.1.2"
  },
  "devDependencies": {
    "babel-eslint": "7.2.3",
    "babel-jest": "^22.0.3",
    "babel-plugin-transform-class-properties": "^6.24.1",
    "babel-plugin-transform-decorators-legacy": "^1.3.4",
    "babel-plugin-transform-es3-member-expression-literals": "^6.22.0",
    "babel-plugin-transform-es3-property-literals": "^6.22.0",
    "babel-plugin-transform-object-rest-spread": "^6.26.0",
    "babel-plugin-transform-remove-console": "^6.8.5",
    "babel-plugin-transform-remove-debugger": "^6.8.5",
    "babel-preset-env": "^1.6.1",
    "babel-preset-es2015": "^6.24.1",
    "babel-preset-react": "^6.24.1",
    "cross-env": "^5.0.2",
    "enzyme": "^2.8.2",
    "eslint": "4.1.1",
    "eslint-config-react-app": "^2.0.1",
    "eslint-plugin-flowtype": "2.34.1",
    "eslint-plugin-import": "2.6.0",
    "eslint-plugin-jsx-a11y": "5.1.1",
    "eslint-plugin-react": "^7.5.1",
    "husky": "^0.14.3",
    "identity-obj-proxy": "^3.0.0",
    "jest": "22.1.2",
    "jest-css-modules": "^1.1.0",
    "lint-staged": "^6.0.0",
    "node-sass": "^4.5.3",
    "parcel-bundler": "1.5.0",
    "prettier": "1.10.2",
    "react-test-renderer": "^16.2.0",
    "redux-mock-store": "^1.2.3",
    "sinon": "^4.1.6"
  },
  "scripts": {
    "watch": "cross-env REACT_APP_VERSION=$npm_package_version parcel watch src/index.js --out-dir ./public/static --public-url ./static/",
    "test": "jest",
    "lint": "eslint ./src",
    "pretty": "prettier --write \"src/**/*.{js,css,md,scss}\"",
    "precommit": "lint-staged",
    "prepush": "npm run test --coverage"
  },
  "lint-staged": {
    "src/**/*.{js,css,md,scss}": [
      "prettier --write",
      "git add"
    ],
    "src/**/*.js": "eslint --max-warnings=0"
  },
  "jest": {
    "rootDir": "src",
    "moduleNameMapper": {
      "\\.(css|less|scss)$": "identity-obj-proxy"
    },
    "transform": {
      "^.+\\.js$": "babel-jest",
      "\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$": "<rootDir>/fileTransformer.js"
    },
    "setupFiles": [
      "<rootDir>/setupTests.js"
    ]
  }
}

Used cli command: yarn watch (see script in package.json above)

🤔 Expected Behavior

I expect the parcel watch command to finish building.

😯 Current Behavior

The command is getting stuck while building.

💁 Possible Solution

No idea, sorry.

🔦 Context

I will have to stay at version 1.4.1 until the watch command works again in my project, as I heavily depend on the watch command during development.

🌍 Your Environment

Software	Version(s)
Parcel	1.5.0
Node	8.9.3
npm	5.6.0
yarn	1.3.2
Operating System	Microsoft Windows 10 Enterprise [Version 10.0.15063]