Steps to reproduce:
1. Choose a series which contains a mediapackage with missing files *(missing video, attachments, etc.). Lets say this mediapackage is 'corrupted'.
2. Add additional ACL(s) to series.
Depending on when the ACL update comes across corrupted mediapackage, mediapackages before it are updated whereas all subsequent mediapackages remain unchanged.
All uncorrupted mediapackages should be updated.
Workaround (if any):
Remove corrupted mediapackages, or references to their missing files, prior to updating the series ACL.
Missing files are not a requirement for corrupted mediapackages. They can be generalised to those mediapackages which cannot be snapshot(ted).