Issue Summary

Post function "copy value from other field" does not work on the create transition for Assignee field (Inheriting the value from the parent issue to a sub-task)

Steps to Reproduce

1. Navigate to your project settings > Workflows > Find the workflow related to sub-task issue type >Edit > Click on the create transition > Post functions
2. Configure the Post function "copy value from other field", copying the assignee field from parent to the sub-task:                       
3. Save the workflow draft
4. Create a sub-task in an assigned issue

Expected Results

when creating a sub-task, the Assignee of the parent is copied to the sub-task.

Actual Results

The assignee is not set.

Workaround

Use a Jira automation rule as described in the following community thread:

• https://community.atlassian.com/t5/Jira-questions/Copy-Assignee-and-Reporter-display-name-into-a-custom-text-field/qaq-p/1160433