I had an HTML stack as the last stack on my page. It was audio html. The player displayed, but the total time showed as zero and the audio didn’t play.
I spent a lot of time checking the src filename and after setting the src to the full URL of the file and it still failing I realized there was a different issue. The solution was to place a Text stack, with no text after the HTML stack. The audio then displayed with the total time and the audio played.
This could be an issue with the stack and the code it creates, or only if the HTML stack is audio code.