Build files differ across environments

[monolithed]

Locally, I don’t see any errors, but they randomly appear in production after each rebuild.

I tried catching them on test environments, but they are not reproducible there either because the builds differ. Even on -projects.vercel.app environments, where the build should be identical, files with the same names have different sizes!

I see two problems here: 1) It's impossible to catch errors locally, 2) Vercel creates different builds each time. It's impossible to test the code on a staging environment and deploy the same build to production.

Is this a bundler error?