Seems fixed on Safari, except that there is no sound for the first 2-6 or so questions in Classic Review. I don’t know if this is a lag but it seems strange. The first question that appears in Classic Review with a big loudspeaker image on the left seems to resolve the issue, if it has not already resolved by then. Clicking on the speaker image will always play the sound, and thereafter the sound is present and correct.
I notice this was reported in 2016 IT IS STILL A PROBLEM!!! It makes some sessions almost useless and very frustrating. It seems to be random. If it is still here after more than four years, will it ever be fixed? It is not just the audio icon either.
I started having the same problem about two days ago. The audio never works for the big audio icon, and sometimes works for the page with the three smaller icons, and sporadically works for that Speed Review. Windows 10 user.