Hello,
As that note 1772588 says:
""Please note that changing the user ID to the actual approvers name is not possible if the trip is approved as part of a background processing job"
One of the downsides of upgrades is that SAP tends to be stricter with its own rules.
Could you show what your workflow steps are? If the user executes the step immediately before the background job then sometimes it is possible for them to be the executing agent - or at least it used to be the case.
regards
Rick Bakker