Project record has a number of tasks. A number of these tasks have sub-tasks. One of these tasks has sub-tasks. Again, some of these have further sub-tasks. These tasks are “Closed Complete 100%” yet the corresponding master task shows “Closed Complete” but only 99% complete.
Release or Environment
Unknown - may be a one-off anomaly - not reproducible
Updating the Percent complete values to another value (random) and then update back to 100 resolves the issue.