Hey there, Leymarie! Thanks for getting in touch.
Yeah, we noticed the same thing this morning when we updated to the latest version of WooCommerce ourselves this morning.
Our WooTickets plugin inherits the styling used by WooCommerce. In other words, we don’t force any specific style but rather inherit the styles implemented by WooCommerce. We tested this on other non-ticket products and the issue applies there as well. That means it’s related to change with WooCommerce rather than the WooTickets plugin.
You can try to style the controls yourself using CSS, but your best bet is to let the WooCommerce team know about the change and request that the styling be added back in.
Sorry I don’t have a concrete solution for you here, but I hope this helps shed light on the issue.
Cheers!
Geoff