Transcript doesn't sync with video playback

If the lesson includes a video plus script, then turning on the Scroll option does nothing, the transcript doesn’t sync or advance when the video plays.

This was in the final part of the lesson titled “Questions” which is this page in the web version. https://www.practiceportuguese.com/shorties/perguntas-questoes-inconvenientes/

Android 11, Pixel 2.

OK. Maybe you want to move this elsewhere but as a learner, an extract of the audio would be more useful to because the script is helpful (vs the value of the audio.) The video is definitely cute!