Thanks for info.
Unfortunately I did not get much closer to the solution as the workflow apparently runs fine when in debugging mode.
Anyway, I deployed this workflow to another system it works well there!
So it seems something somehow is stuck regarding this workflow in the original system.
So moving forward I have another problem now:
How to get notified - at user level - of errors in the workflow execution when run in background?
This workflow will primarily run in the background, started by a background job.
I deliberately put some error in the workflow and I get no notification of the error.
The background job that starts it gets to ‘Executed’ state without any errors or warnings.
What is the solution here, how can one see when the workflow execution in the background runs into an exception?