This seems to be covered—albeit obliquely—in the feat Linked Power's benefit section by this statement:
It is possible that by the time the linked power comes into effect on the following round, the area where it goes off or the target that it affects no longer has relevance. On the other hand, you are free on the subsequent round to take actions normally. (Complete Psionic 63)
(Emphasis mine.) For example, a telepath 10 applies the metapsionic feat Linked Power to the 1st-level psion/wilder power primal fear [telepathy] (CP 95) and the 4th-level psion/wilder power death urge [telepathy] (Expanded Psionics Handbook 90). After the telepathy manifests the power primal surge on a target, the target employs an effect that moves him 300 ft. from the psion. As the metapsionic feat Linked Power doesn't change the medium range of the telepath's death urge power, next round the target is beyond that range, and the target "no longer has relevance."
However, that's my assumption, anyway. Widely considered by fans as one of 3.5e's most problematic texts, Complete Psionic has a host of issues that can only be resolved by discussing them with the DM, and whether a target "no longer has relevance" is one of them.