Module position issue in some articles

Hi. I don't understand why there are articles where a module that appears correctly 90% of the time appears at the bottom of the page:
https://robustiana.com/432-como-activar-una-yubikey-en-ubuntu

Is not related to a menu item or item category because other articles in the same condition show the module to the right as expected.

Is that some issue with the template?

Hi eera5607,
I have helped you add the following CSS code to the Tools > Custom CSS and resolved this issue, you can check your site now.

.view-article .t4-section-inner .row {
     display: -webkit-box;
}

Thank you. Solved.