Hello Skandha,
I changed the header image to the given ratio (1920×1080) and scaled the „featured sites slider“-images to a „WQHD“ ratio (2560×1440). But the resolution change didn’t fix the problem yet. It still displays the issue.
The issue also persists not just on the mobile page, but on the desktop page too. After removing the menu via the google chrome console it was visible on desktop too.
Still kind regards,
Michael.