It would be great if we could get more info on stash/unstash so I could see a list of files included. I was recently hit by an apparent unstashing hiccup where 1 file that should have been unstashed was not actually there and it made the subsequent errors rather confusing.

Had there been a list of files in the log that were successfully unstashed then it would have been more clear what the problem was. Perhaps there could even be a validation step to go with this where if the number of files unstashed doesnt match number of stashed files then it logs an error.