In task switching, response repetitions (RR) yield performance benefits compared to response switches, but only when the task also repeats. When the task switches, RR benefits vanish or even turn into RR costs. This interaction can be explained by task-response binding and retrieval processes. Accordingly, RR costs in task switches indicate that the task and the response become bound in trial N-1. Hence, repeating the response in trial N retrieves the N-1 task. As the N-1 task is the wrong task in task switches, this retrieval induces RR costs. In this study (Exp1: data reanalysis, N=255; Exp2: N=96), participants switched between three tasks and responded to stimuli that always afforded a response to each task. We examined task-repetition errors, namely responses that are wrong under the current task but would be correct under the N-1 task. We used task-repetition errors as indicators of erroneous re-activation of the N-1 task. Our study shows, in task switch trials, a larger probability of task-repetition errors when the correct response should have been repeated than when it should have been switched. This result aligns with a response-triggered retrieval of the N-1 task. It suggests that, after the correct task is selected, the process of response selection can loop back into task selection, occasionally activating a task that competes with the selected one. This study provides novel evidence for episodic retrieval in task switching while delving into the interplay of task and response selection.