[Bug]: Urgent see https://github.com/jestjs/jest/issues/15690

[Luligu]

Version

30.0.4

Steps to reproduce

See #15690

Expected behavior

I expect all tests to continue to work.

Actual behavior

unstableMock is broken since 30.0.0

Additional context

No response

Environment

System:
    OS: Linux 6.6 Debian GNU/Linux 12 (bookworm) 12 (bookworm)
    CPU: (12) arm64 unknown
  Binaries:
    Node: 22.16.0 - /usr/local/bin/node
    Yarn: 1.22.22 - /usr/local/bin/yarn
    npm: 11.4.2 - /usr/local/share/npm-global/bin/npm
    pnpm: 10.12.1 - /usr/local/share/npm-global/bin/pnpm
  npmPackages:
    jest: ^30.0.4 => 30.0.4