The width of elements changes uncontrollably - how to fix it?

Question

Joomla

Hello! Question about this template: www.globbersthemes.com/demo/odessa/index-2.html
It is not clear why the slider width changes under two conditions: 1. When you first enter the site. 2. And when you change the width of the browser itself, and then expand it back. In the first case, the width of the slider is smaller, not reaching the right edge of the browser, and in the second case, the width of the slider becomes normal, reaching the right edge of the browser.
Please tell me how to remove this glitch? How to make the width of the slider and at the moment of entering the site stretched to 100% of the screen width?
Here is a link to the template files (this is Joomla), for some reason the download file was removed from the site: dropmefiles.com/hGw4Z