Steps to reproduce:
1. Modify your system in such a way that the zip archive operation in the default error workflow handler would fail (e. g. write protect the failed.zip wfr collection)
2. Start a workflow and add the "failing" workflow operation handler with the default error worfklow as the error handling workflow.
The workflow will keep running, since after entering the error handler workflow, that workflow will repeat itself due to the failing zip operation.
The error workflow should ignore errors.