The website https://www.sport.cz does not display a mobile version of the page

Hi, the website https://www.sport.cz does not display the mobile version of the page, but in the PC version and also displays advertisements. Restarting the browser will not help. It displays the page in the mobile version only once and then again in the PC version. After restarting the browser and clearing the browsing data, it will display the mobile version once again and then only the PC version. See GIF

Thanks for the report. Have created an issue report;