We have the following issue: our project has a Default Assignee option set to 'Project Lead' (or to Component Leads, but even without components I see the same problem).
And then for some issue types (sub-tasks, for example), we would like to remove Assignee.
I put 'Clear Field Value' post-function for the Create transition and clear the Assignee field there. But it just does nothing. Any new issue is always assigned to the project lead after creation.
I have tried to change the position of the post-function, even putting it as the latest in the list. No results.
Does anybody know why? I have found one way to fix it with Automation, but I would like to do it without any Automation rules.