One-hour estimated duration is not shown
When giving task an estimated time it is shown as a time above task name in Planner view. However, if you choose 1h this time is not shown, this is problem because all task without any time are also empty from the time. So, there is no way to know if estimated time is NaN or 1h without going for details.
1h is our default value which is why we chose not to show the value to clear up the user interface.