Background colour from combo class is overriding itself and I can't reset it

I have a combo class called “anim” which is used as a selector for some custom Javascript. It’s used all over my site, and in quite a few places it’s combined with a base class called section-paragraph. Unfortunately somewhere along the line a background colour I don’t want has been applied to this combo class of .section-paragraph.anim. I don’t seem to be able to reset this from the UI:

Screen Shot 2023-08-01 at 11.17.48 am
Screen Shot 2023-08-01 at 11.17.51 am

Pressing reset has no effect and nothing changes. The actually applied background colour is not white, it’s an off-grey, so I assume this style is being set somewhere else.

I don’t want there to be any styles for .section-paragraph.anim, just .section-paragraph, so I would just to just reset the whole thing. I’m worried that if I delete .section-paragraph.anim style from the style manager it will be removed from all of the places it’s meant to be so I’ll lose my animations, so I don’t really want to do that. Any other way to fix this?