Minimal repro for a Metro bug.
$ scripts/repro.sh
### Setup (yarn, Metro)
yarn install v1.22.5
[1/4] 🔍 Resolving packages...
success Already up-to-date.
✨ Done in 0.17s.
### Initial build
Expected: Hello from main1.js
Actual: Hello from main1.js
### Build after changing package.json (same Metro instance)
Expected: Hello from main2.js
Actual: Hello from main1.js
### Build after changing package.json (new Metro instance)
Expected: Hello from main2.js
Actual: Hello from main2.js