The following stacktrace is reported from the mobile site, and in the Cordova apps when performing subsequent bookings after the first:
Uncaught TypeError: Cannot read property 'tickets' of undefined create-booking.js:75 Backbone.View.extend.save create-booking.js:75 jQuery.event.dispatch jquery-1.9.1.js:3074 jQuery.event.add.elemData.handle jquery-1.9.1.js:2750