Pushover sound not playing on phone

Not sure if this is the place to post this but I'm desperate!
I've been using Pushover in various apps to send notifications to my phones. The notifications were accompanied by audio clips that played. Worked fine.

Now I've replaced both (Galaxy) phones with upgrades (S24 & S24+). The Samsung software transferred all my apps and data to the new phones. The S24+ works fine, however the S24 only gets the notification but does not play the accompanied audio clip.

I've changed the phone devices at pushover.net and they appear correctly in the Hubitat Devices listings. I've looked in the Pushover app on both phones and they look to be the same. Where should I look to see why the audio does not play on one phone?