Featured images not responsive on home page

Hello.

This is a great theme. And i works quite well, but i just can’t pass this one issue. In the responsive version, the featured images on home are note getting it. ?? Everything else is adjusting just fine (including that same images inside posts) but on home the featured images just display the same size and is killing my design.

My website: https://www.libdera.com

Any help will be really appreciated.