How often is a MP3 supposed to play on a Qwii2 MP3 trigger?

So I’ve gotten my Qwii2 MP3 hooked up and working. When I short pin 1 to ground, the MP3 plays repeatedly and doesn’t stop!

Is there something obvious I’m not doing right?

It’s a known issue. See here:

viewtopic.php?p=223384#p223384