Automation rule error message misleading

Issue Summary

The automation rule to clone issues throws the following error message even when the issue was cloned successfully and the problem field skipped:

Unknown fields set during clone, they may be unavailable for the project/type. Check your custom field configuration. Fields ignored -
Description (description)

Although this may prevent silent data loss, it is a bit misleading especial in email notifications.

Steps to Reproduce

1.  Trigger: new issue is created
2. Action: Clone issue and specify a field that does not exist in the target issue screen.

Expected Results

We expect the following error message:

successful with some errors. Unknown fields set during clone, they may be unavailable for the project/type. Check your custom field configuration. Fields ignored -
Description (description)

Actual Results

The below exception is thrown in the rule's audit log

Unknown fields set during clone, they may be unavailable for the project/type. Check your custom field configuration. Fields ignored - Description (description) 

Workaround

No workaround