The current pre-release of the client ("pioneer" in the version) is only compatible to itself. So you can only play with other testers. Please be aware!
@CpaHb said:
This does not apply to mapgens or other options, only for dual gap type maps.
No, there are no plans to implement special rules for specific map types.
@cpahb A great post And it's great that everything is working now. What makes me even happier is that you share your experiences and your discoveries or insights. That’s exactly what FAF is all about.