Line transparency not affected by stroke alpha value

[SimplyOnMyWay]

When using :p3d renderer and (q/colormode :hsb 360 100 100 1.0) I am unable to get transparency working when setting the stroke of lines. For example, I would expect the following to give a transparent red

(q/with-stroke [0 100 100 0.5]
   (q/line p1 p2))

I can get this working ok with standard renderer or :p2d, but not with :p3d.

For reference my deps.edn contains the following dependencies:

{:deps {org.clojure/clojure {:mvn/version "1.10.1"}             
        org.clojure/clojurescript {:mvn/version "1.10.520"}     
        quil/quil {:mvn/version "3.1.0" :exclusions [org.clojure/clojure org.clojure/clojurescript]}