WooCommerce Checkout Redirect

Hi there,
I’ve found a very strange compatibility issue with WooCommerce. I am using a plugin that asks for specific attendee/user registration information when users go from the cart to the checkout. When wp-miniaudioplayer is enabled, once a user completes checkout, they are sent back to the attendee registration page rather than “order-received” page. When this plugin is disabled, everything works perfectly. This happens even while using default WordPress theme, and no other plugins.
I’ve looked through the code and can’t see why this would be happening.
Any help would be greatly appreciated.
Thank you!
Jarrod.