When there’s a genre with a long name at the very right of this display, a horizontal scroll bar appears. I’m not sure of how this could be avoided, but I’d like to see it so I thought I’d just throw it in here.
You mean Horizontal scroll? Vertical would be going up and down.
I think this is by design of the plugin/module they use to display that section. Because for many of us, we could have well over 20 genre’s and there’s no way they can all fit within that sections width.
However, when the website goes into mobile mode, the genre’s stack on top of each other.
Yeah, horizontal scrolling, of course, it was late last night. 
Could you perhaps provide a screenshot of that stacking so I know what it looks like?
