It’s happening to me too, win10, Firefox.
Here’s a way I could reproduce it consistently:
- Practice → Cram
- Search for the grammar point “に際して”, add to the cram session
- Start the session
- Enter the correct answer: にさいして
- Expected: the correct audio plays automatically. Actual: it plays only when click on the button or press P.
If I do the exact same steps, but replace it with a different grammar point (e.g. the N5 だ), it plays the audio automatically.
Just in case: the bunpro settings are set to play automatically, and the browser site settings are also set to “Autoplay: Allow Audio and Video”