It's the cloud. Runners are ephemeral (pretend, but still) with no persistent storage. This makes you either rebuild everything in every release stage (bad) or put artifacts in s3 or whatever (also bad) - this is especially painful for intermediate artifacts like dependency bundle caches etc.

As much as I like make it just doesn't work with the typical cloud stateless by default configs. If it works for you, your project is small enough and try to keep it this way.