Thumbnails problem

Hello,
After i made some changes (i mean with the options) to the plugin on my website i noticed there is a problem with the larger images. Practically the images are not resized anymore in posts where the featured image should be wide. Here’s an example: http://trucchiesoluzioni.net/guida-clash-royale/

Is there anyway to fix this? Maybe you could help me find the option of the plugin that’s causing the issue.

https://wordpress.org/plugins/w3-total-cache/