Container blocked and not stoppable for more than 20h

Yesterday I launched a basic test suite on a NodeJS project.
It failed on the “Restore source cache” step and is now in the “CIRCLE BUG” state but the container is still considered open. I cannot stop the build or the container and all my others build are stopped as it’s waiting for the container to be released.

Any idea of the reason behind this bug and how to fix it? (at least a way to stop the container)