nodenext alternates between finding and not finding the imported package

[ilogico]

Bug Report

🔎 Search Terms

• node12
• nodenext

🕗 Version & Regression Information

4.5.0-dev.20211016

• I was unable to test this on prior versions because this nodenext modules will only become available in 4.5

💻 Code

It needs a monorepo setup to reproduce. I made a small repository: https://github.com/ilogico/ts-nodenext-bug

This happens all the time when editing a file, but it's hard to reproduce in a deterministic way.

I reproduce it here by toggling line comments back and forth:

🙁 Actual behavior

The language service says it cannot find the module or it's corresponding type declarations after having correctly resolved the module.

🙂 Expected behavior

The module stays resolved.

[DanielRosenwasser]

I think I observed something similar at #46373.