I want to establish an overview of the summarized Original estimates and I succeeded in summarizing Original Estimates from sub-tasks to their parent (task level) by using the following rule:
{{issue.subtasks.Original Estimate.sum.divide(3600)}}h
See below trigger used.

Additionally, I would like to summarize Original Estimates from tasks to their parent (Epic level) and the logic rule for this is:
{{issue.tasks.Original Estimate.sum.divide(3600)}}h
However this does not work.
How do I summarize Original Estimates from tasks to their parent (Epic level)?