Player play button not starting Audio in Review 360

Since it plays fine in preview but breaks in the published package, I'd treat this as a delivery issue rather than a project issue. A few isolation tests I'd run:

- Same Review link, different browser, plus a hard refresh (Ctrl+Shift+R). If it clears up, the cache theory is the whole story — a browser can hold onto a half-downloaded audio file and keep playing silence over it.

- Check whether the broken slides' audio differs from the working ones: imported MP3s vs audio recorded in Storyline, longer files, anything re-compressed outside Storyline. If it's one batch, re-encode one broken file at standard settings and re-test just that slide before touching the rest.

- The detail that going back and returning fixes it is a tell: on revisit the audio is already loaded, so playback starts clean. That points at a load-timing hiccup, not a corrupt timeline.

If the cache clear doesn't stick, take that one-slide re-encode result to your support case — a clean repro on a single slide is the fastest way to move it forward.