Guest Stars not affected by the "Smaller cast list"

[sa-akhavani]

Describe what and where does not get themed by Ultrachromic
When I use the "4. Smaller cast list" tweak, if I am in a TV Show episode that has a guest star list, that list is not being affected by this tweak. See the sceenshot for more details.

Screenshots

[josebatistam]

I made a workaround by copy/pasting the code from https://cdn.jsdelivr.net/gh/CTalvio/Ultrachromic/smallercast.css into the Custom CSS code field. Just replace all instances of #castContent with #guestCastContent.