Ghost Crates are a rare phenomenon in the mobile version of Grand Theft Auto: San Andreas.
The glitch occurs during the mission Custom Fast Track, where CJ has to find the crate filled with a Jester and steal the vehicle for Cesar. The Ghost Crates appear to be a spawn glitch, where the game doesn't understand how many crates to spawn and where. This occurs with all crates that can be picked up with the crane. Though it is possible to pick up two of the three boxes, the third one is stuck inside the boat, making the mission unplayable. It is unknown if this glitch occurs in other ports of the game.