"Some checks were not successful" even if they were

I am running the Coveralls GitHub action in a monorepo, setting the parallel flag to true so that I can run the coverage jobs in parallel and batch-upload them at the end of the GitHub workflow execution. Here's my integration script:

https://github.com/hifi-finance/hifi/blob/10e8767c3749a3bf6a5cfe2c1c151df5935be87a/.github/workflows/integration-contracts.yaml

The issue is that occasionally, even if the workflow executes successfully, the Coveralls integration shows a red cross icon on the main page of the repository:

The error being:

Some checks were not successful

But the checks are successful! If I take this CI execution as an example, we can see it ran as expected:

https://github.com/hifi-finance/hifi/actions/runs/1270454967

The error seems to indicate that the "flash-swap" and the "protocol" jobs failed somehow. But if I look them up:

• https://coveralls.io/jobs/87391829
• https://coveralls.io/jobs/87391804

I can see no error in the Coveralls website. This might be a bug in the GitHub integration of Coveralls when the coverage reports are uploaded in parallel.

Start with .github/workflows/integration-contracts.yaml and compare the parallel Coveralls uploads with the final workflow status from actions/runs/1270454967. Review Coveralls jobs 87391829 and 87391804 to trace why successful uploads produce a red repository check. Done means a successful parallel workflow no longer reports “Some checks were not successful.”