Unit tests are failing now but no code changes

Hello, we are having a very strange issue and there have been no code changes to make it happen!

We are using the setup-java action to build a Kotlin app with Gradle running on ubuntu-latest. This has been working for over a year. Sudenly yesterday it started failing on two of our unit tests. Since nothing had changed I went back and re-ran branches that previously had passed and they too are failing! I am at a loss for how to troubleshoot this, any suggestions would be appreciated.

The errors are
Error 1
Test test processFunction when ActionLogs has an error() FAILED
java.lang.AssertionError: Verification failed: call 1 of 1: WorkflowEngine(#467).isDuplicateItem(any())) was not called
Error 2
Test test processFunction duplicate override true to false() FAILED
java.lang.AssertionError: Verification failed: call 1 of 1: ReportFunction(#608).doDuplicateDetection$prime_router(any(), any())) was not called.
Calls to same mock:
1) ReportFunction(#608).processRequest$prime_router(gov.cdc.prime.router.azure.MockHttpRequestMessage@2d3aa5e5, gov.cdc.prime.router.CovidSender@5944991a)
2) ReportFunction(#608).validateRequest$prime_router(gov.cdc.prime.router.azure.MockHttpRequestMessage@2d3aa5e5)

The relevant portions of the workflow:

  build_router:
    name: Build Router
    runs-on: ubuntu-latest
    needs: pre_job
    if: ${{ needs.pre_job.outputs.has_router_change == 'true' }}
    defaults:
      run:
        working-directory: prime-router

    steps:
      - name: "Check out changes"
        uses: actions/checkout@dcd71f646680f2efd8db4afa5ad64fdcba30e748

      - name: Set up JDK 11
        uses: actions/setup-java@4fe61d24fe5472910b93bdeffb8aad49f979d862
        with:
          java-version: '11'
          distribution: 'adopt'
          cache: 'gradle'

      - uses: gradle/wrapper-validation-action@859c33240bd026ce8d5f711f5adcc65c2f8eafc1

      - name: Spin up build containers
        run: docker-compose -f docker-compose.postgres.yml up -d

      - name: Build Prime Router Package
        run: ./gradlew package -Pshowtests

Really just looking for pointers on how to troubleshoot this - it works locally.