`tsc --watch` doesn't recompile on file change

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## Steps to reproduce

I haven't been able to reduce this to a minimal reproduction yet. I will continue trying but in the interim, any tips that would help debug the issue would be much appreciated.

I'm running `tsc --build --watch` from one package in a monorepo whose `tsconfig.json` has references to other packages within the monorepo.

Node v24.18.0
macOS 26.5.2 arm64

## Behavior with `typescript@6.0.3`

Changing files in the package triggers a rebuild.

## Behavior with `typescript@7.0.2`

Changing files in the package does not trigger a rebuild.

https://github.com/user-attachments/assets/b12bc159-1db5-42ab-ad5f-33e9a71d7646

首先将报告的 monorepo 案例缩减为最小复现，然后使用 TypeScript 6.0.3 和 7.0.2 运行 `tsc --build --watch`，同时修改 package 中的一个文件。当 7.0.2 的 watch build 能够可靠地检测到更改并重新构建时，工作就完成了。

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