Units settings being reset after manual adjustment

Using the attached network as an example, the following steps seem to be leading to suspected bug: 1: Open the network, and double-click on the bottom-left most nonStorage node, "NonStorage" 2: Adjust the units from ac-ft/month to m3/day, click Apply and OK 3: Double-click the same node again and notice the units reset themselves back to ac-ft/month.