You are using MSM with ContentCopyAction and delete a page in the LiveCopy. Corresponding page in the BluePrint loose all Nodes below their jcr:content Node.
Main problem is the existing property jcr:frozenUuid on all Nodes below jcr:content on the LiveCopy pages which point to the version history of the corresponding Node in the BluePrint and was copied by the VersionCopyAction.
In such a case the restore of this Node results in a deletion of the Node the uuid in jcr:frozenUuid points, so the Node on the BluePrint.
To fix this issue we recommend to adapt the Rollout Manager config and exclude "jcr:frozenUuid" and "jcr:uuid" from rollout:
Please note that this fix takes effect only for LiveCopies created after this adaption of the config.
For already existing LiveCopies it's required to remove property "jcr:frozenUuid" from all Nodes in the LiveCopy tree (i.e. with a helper script). Versions created from this time are save to restore, versions before cannot be fixed and have to be purged.