before your ticket is assigned to one of my colleagues, please allow me to walk you through some initial debugging steps. This will help speed up the support process.
Your theme is adding 220px for any "UL" element. You can add CSS to style only that sub-menu class.
Here is an example:
ul.sub-menu {
max-width: 100px;
}
It seems the website got changed at the last minutes, so this class doesn't appear. I recommend changing it back, as it was in the same state when you reported that issue 1h ago.