If you are in the Smart mode - To turn the bounce OFF for some time, tap the Soothing card > slide bounce to OFF and lock that state by tapping the lock icon. This will lock the crib’s bounce at OFF for the next 10 minutes, and the Smart mode will resume after the lock timer runs out. You can also change the default value of the lock timer from 1 minute up to 30 minutes by going to Settings > Soothing > Smart controls > Lock timer.
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If you’d like to deactivate the Smart bounce and not use bounce for the entire night, you can go to Settings > Soothing > Bounce > Mode > Manual. In the Manual mode, the bounce will only start when you tap on start using the app / use the start gesture.