Recipe: (re-)launch max, new patcher window, create two ui objects eg a numberbox and a toggle. With the last created item selected, open the inspector. Now click on the other object and the inspector won't update. Only after clicking in empty space will it do so. This was in 5.0.4 and remains in 5.0.5.
By the way, for the patcher inspector, it would be a great addition to be able to select the current position as Fixed Initial Window Location.