I have an Epic (hierarchy 1) that contains a Story/Task/Bug (hierarchy 0), which in turn has Sub-tasks (hierarchy -1).

When I log time in a Sub-task (hierarchy -1), it reflects on the child issue (hierarchy 0) if the "Include Subtask" option in the Story/Task/Bug is enabled.

Similarly, when I log time in the child issue (hierarchy 0), it shows on the parent issue (hierarchy 1) if the "Include Subtask" option in the Epic is enabled.

However, the time tracked in the Sub-task does not roll up to the total time tracked in the Epic, even though the "Include Subtask" option is enabled.

For instance, if I have a Sub-task where I logged 1 week (1W) and a Bug where I logged 1 hour (1H), the total time tracked in the Bug issue will display as 1W 1H if the "Include Subtask" option is enabled. In contrast, the Epic issue only shows 1H, disregarding the time tracked under the Sub-task, despite the "Include Subtask" option being enabled.