by Juan Leyva.
Hi Jan,in this case the rendering of the quiz questions is done by the question API that is not aware that the request is coming from Moodle Web or the Web Service server.
We are aware of that issue but it doesn't have an easy solution, since is not a big deal and is something common in old APIs, the fix that we applied is just fix the urls when they are received.
Is far from ideal, but I said before, refactoring the complete question API for that will be a huge task (more than implementing the quiz player itself)
Regards, Juan