gzip: stdin: not in gzip format. ( Cache restore not working)

Steps to reproduce error

name: Caching venv

on: push
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v4
    - name: Cache venv
      id: cache-venv
      uses: actions/cache@v4
      with:
        path: .venv
        key: ${{ runner.os }}-venv

Test:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v4
    - name: restore Cache venv
      id: cache-venv-restore
      uses: actions/cache/restore@v4
      with:
        path: .venv
        key: ${{ runner.os }}-venv

Error:
gzip: stdin not in gzip format
Child returned status 1
Warning: failed to restore failed with exit code 2
Cache not found for input keys ***

Note: cache is created but restore fails

Start by reproducing the workflow using actions/cache@v4 and actions/cache/restore@v4 from the issue, comparing the cache creation and restore steps. Trace the restore action's handling of the generated cache and the gzip error. Done means a cache created by the first job restores successfully in the Test job without the reported error.