I can think of following setup.
In order to resolve an issue you need to go through a transition (not just by Edit). Then copy the assignee
into a new custom field (named Resolver) as a postfunction of this transition.
If this issue then goes through the Reopened transition copy the value of Resolver into Assignee.
That should work,
Atlassian Summit is an excellent opportunity for in-person support, training, and networking.Learn more
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG