Flip boxes content not showing

Hi, the flip box content front and back are not showing. I’ve been looking for a solution on the forum, and i found two CSS class for resolve the problem. After adding this css class, the content is showing, bus not centered. The content is on the top of the box. It’s on this pages:

https://www.viajamalaga.com/gastronomia-malaguena/
https://www.viajamalaga.com/tipico-de-malaga/
https://www.viajamalaga.com/tipico-de-malaga/

Can you help me please? Thanks!