Another bugreport. Load the save with long name and wait till 08:00 of 7th of June, 1999. Two Battleships will be detected, flying with their full speed of 6250 mph, UFO-117 and UFO-118. Wait. When UFO-177 will be near one of the X-COM bases, another Battleship will be detected, UFO-119. The 117th will land and a base defense will begin. After the successful defense no UFOs will be seen. Two other Battleships will vanish.
I've attached a save after the base defense.
Oh, I was so happy to anticipate a series of base attacks, but no, the Aliens seem to have been frightened by the fate of their shining UFO-117.