Problem with tablet and mobile display

Hello, I am using your plugin for my menu on a Divi template. My site is currently under construction, and I can provide access if you wish to take a look. While everything is fine on the desktop, this is not the case at all for tablet and mobile displays. On these devices, my menu has disproportionately large images and, more importantly, it gets stuck on the first two links without the possibility to scroll down further. Could you please suggest a solution? Do we need to apply additional CSS to correct this, as it was indicated to be functional for these two versions? Best regards.