The root cause is that Tailwind’s scanner expects class names as plain strings, not as Clojure keywords or in bracketed/newline-separated forms. The most reliable solution is to always use strings for class names in your Clojure code and, if needed, implement a custom extractor or safelist for edge cases. If you want to contribute a fix or improve the extractor, you can look into writing a custom regex or extractor in your Tailwind config.

Using keywords for classes is quite common in Clojure, and it's a tall order to ask all of those codebases to change, and people to change their habits. Other than that, Clojure syntax is complete, and will never change. V4 currently supports a subset of Clojure syntax, and there are just a couple of things to iron out, so IMO it makes sense to bring that up to 100% and then it's done, permanently.