Estimates Aren't Rolling Up To Parent Issues

Ensure there are no estimates on your parent issues. Hierarchy for Jira looks for an estimate on each issue. If it finds one, it uses that estimate and does not roll up the estimates of its children.

If no estimate is found, it rolls up the estimates of its children.

To roll up the estimate from an issue’s children, set (or reset) the estimate on the parent issue to 0.