I am wondering if this may be a themes thing. I honestly don’t know. @ehcah didn’t you run into something like this with tabbed-card not showing colors correctly months ago?
compound you could also search and ask the tabbed-card group here: 🔹 Card-mod - Add css styles to any lovelace card.
Sorry I am not able to replicate your problem but maybe we should pester GROK about it 