I am experiencing this same issue. Need it fixed asap. We have multiple events and no one is able to register for more than one. Here are the events: allstardartseries.com/2018-finale
Also, would like to remove the “login before purchasing. .td-app display fix only works for some events.
The “Buy Now” button is not responsive and disappears on mobile. No one can register from their phones.
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PLEASE LEAVE FOR SUPPORT
Reporting the same issue as: https://theeventscalendar.com/support/forums/topic/multiple-transactions-and-attendee-info-missing/