Rule for adding label in a workflow not appending labels in a Next-Gen Service Desk project.

Issue Summary

In the Next-Gen Service Desk project when there is a rule configured in a transition to add a label to the label field. It is not appending those labels, rather it is clearing the labels field and adding the label mention in the rule.

Steps to Reproduce

1. Open a Next-Gen Service desk project.
2. Open a Request Type and edit workflow.
3. Add a rule to a transition to add labels to the label field. Ex. Label A
4. Configure the above for the next transition. Ex Label B
5. Now create a ticket and do a transition for that ticket, you will notice Label A being added to the label field.
6. Now do the second transition, you will notice that Label A is removed and Label B is added to the label field

Expected Results

Labels should be appended when new labels are being added from a rule in a transition

Actual Results

Labels are getting replaced

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available