Mobile Tabs Expanded by Default

On mobile phones (iP6, e.g.) all tabs are expanded by default using v1.2.3.
When clicking tabs link, tabs do not collapse.

Could you take a look at http://conservationvip.org/destinations/galapagos-islands/ and let me know how to fix so tabs are collapsed by default as in all desktop browsers?

Thanks!

https://wordpress.org/plugins/tabby-responsive-tabs/