I am running into a wall when trying to get this to work. What I would like to do is to sum up all of the time spent on all of the issues linked on an epic, and then all of the epics linked to specific issue.
So it would look something like this (Lets say Theme is the custom issue type)
Theme <- Epics <- Story/Tasks
Is there any way to do this with OOTB, Automation, or with the JMWE plugin?