Intermittent issues with images processing in DAM (AEM 6.1)



when uploading images or other assets to DAM in prod - the majority randomly fail to completely process.  There are no renditions generated, and there is no thumbnail which can be viewed through AEM. Looking at logs I see errors such as, cannot add new rendition, could not render image, unable to find (path to resource), com.day.cq.workflow.WorkflowException: execute gatekeeping failed, asset (path to asset) in payload doesn't exist for workflow.

We are using AEM 6.1