Certain combinations of web browsers and devices that use Apple's iOS can block the audio in the Star Early Literacy test from playing automatically (at the start of the demo video if the Demonstration Video Preference is set to show the video, or before the first question if the demo video is not set to play).
If a student is trying to take or resume a Star Early Literacy test using a device + browser combination that does not support automatically playing audio, the student will be presented with a large Play button on the screen before the demo video or the first question.
The student will need to tap Play in order to see the demo video or the question; after that, the audio will either work normally (and the student will not see the Play button again) or the student will need to tap Play before every question—the button will only appear if and when it is necessary.