That has relapsed; that has returned to an undesirable state, condition, or activity.

Of a person: that relapses into sin, error, or wrongdoing. Also of a sin or crime: †characterized by relapse (obsolete).

That is a recidivist; tending to relapse habitually into crime, reoffending. Also: of or relating to recidivists or recidivism.

Of or relating to a recidivist; tending to relapse or reoffend. Also in extended use: retrogressive.