links unreliable in mobile

Here’s my site:
Champagne Tastes

I love this plug in and it works flawlessly on a desktop computer. On mobile devices, however, I have issues with it only working sporadically. Specifically, it seems that the images in the top right of any gallery won’t link on a mobile. (When the gallery is set 3 wide, the top row middle and right won’t work in mobile).

Any suggestions?

https://www.ads-software.com/plugins/wp-gallery-custom-links/