It may be that the tiny craft is simply too small for the camera to spot, and will remain lost in space until higher resolution imagery of Mars is available.
The show floor space dedicated to three-dimensional imagery has been decimated, relegating a dubious technology to its proper position as a sideshow rather than a leading cause to upgrade your TV.
The Gulf War showed the U.S. military for the first time how important space could be to its combat operations for communications, for the transmission of imagery and even for using global positioning satellites to tell ground troops where they are.