When the Pomodoro Timer prompts you to pause, you should receive a message in Learning mode that the card view will be locked.
Do not show another card during the pause of the Pomodoro timer.
During a pause, no further card is displayed for learning. This technique prevents the learner from overstraining himself/herself, for example by " bulimia learning " before an exam, and that through continuous card learning (learning psychology calls it " massaged learning ") health is damaged and learning becomes ineffective.