When a plane is returned to lessor suddenly, can it be done so that the schedules are shown to be cancelled, rather than simply disappear? It would also be nice if there's a way to see what the old schedule was. The current system where everything about that plane disappeared makes it very difficult, if not impossible, to restore the schedule used by that plane.
Just check the flight plans without assignment and you should be able to rebuild your schedule quite quickly.
And it’s difficult to display sth that doesn’t exist anymore.