More testing today. One issue was tts announcements ("Ran X kilometres in MM minutes SS seconds"). They would fail somehow with both SherpaTTS and Google TTS and ZRX would be stuck. Disabled the announcements, no biggie.
But also the story still wouldn't play. It DOES play if I keep the phone awake with Kaffee though. Weird, but I can work with that.
I've got a ticket open with ZRX as well.