We're sometimes seeing artifacts from successful jobs go missing after re-running the build (failed/incomplete jobs only). We've seen it at least three times now. Bamboo reports that there are no artifacts and when we look on S3 we can see that they are no longer there either.

Example:
https://staging-bamboo.internal.atlassian.com/browse/PUPPETCI-PUPPETCD-875/artifact

See attached screenshots for examples.

The example with missing artifacts was re-run 2 times, the example without missing artifacts was re-run 1 time. Builds for this plan make pretty heavy use of 'rerun failed/incomplete' due to the size and complexity of the plan.

I think the first time we saw this was 2014-09-29, when we were using 5.7-m2. I can't be sure that it didn't happen before then and we didn't notice.