Hi Mike,
Thanks for reporting that: a fairly straightforward solution is to find the code at the start of the tickets.php template:
<?php global $woocommerce; ?>
And change it to:
<?php
global $woocommerce;
if (post_password_required()) return;
?>
Remember that this would ideally be handled within a template override (a copy of tickets.php contained within an events directory inside your theme) – you can read more on that in our themer’s guide and we have a specific tutorial covering template overrides.
So hopefully that offers you an interim solution, meanwhile I’ll talk to the team and see what we can do here.