I always disable it. Having everything using the same exact colour palette is boring/homogenized. The themed icons are even worse, simultaneously killing iconography art and making it much more difficult to differentiate between apps in the app drawer quickly.
That might be a bug or an oversight, but I don’t feel like I need to explain this in order to maintain my stance on/preference for the unified colors. I like it, period. If there are bugs, I hope they get fixed. 🤷♂️