Lower virtual gear to match last effort in workout

Workouts normally finish with cooldown interval with low intense paddling (lets say 90 W). When workount is completed (report screen), it suddenly turn-off ERG mode and switch it back to virtual gear 12 even if you are in the middle of the steepest hill.
Normally I like to spin legs for few additional minutes or. just to continue a ride, and this sudden shock… Can you do something about that? Lets say a gear, where power is in similar level where you have finished last workout, or that transition back to no-ERG mode is less notable.