Original Estimate values presented on the Board do not account for Subtasks Original Estimates

We use the (Rapid) Board and we have our Boards configured to use "Original Time Estimate" for Estimations. (We do not use Story Points.)
The "Original Time Estimate" values presented on the Board only include time from the issue itself (i.e Story or Bug, etc.). Any "Original Estimate" value in the Subtask(s) is ignored and not counted/added to the "Original Time Estimate" presented on the Board.
We would prefer to see: "Original Time Estimate" = issue "Original Estimate" + Subtask(s) "Original Estimate".
Note that the "Remaining" estimate values presented on the Board are the sum of issue + Subtask(s) "Remaining Estimate" values. We are happy with this and would like to see the same consistent behaviour for the "Original Estimate" field.