Menu links wrap around when window is larger

My menu links wrap around when the browser window is larger which doesn't seem to make any sense. Is it something I currently have in my customised code which causing this?

https://www.peterotoole.ie

Any help would be great! Thanks so much!

5 minutes ago, Lesum said:

@niteshifte You can add this code under Custom CSS panel:

@media only screen and (min-width: 768px) {
	.header-nav-list {
		flex-wrap: nowrap !important;
	}
}

Thank you Sam!! Unreal!!