No cockpit sound when switching from other cams like external

I get no cockpit sound when i go from external cam to cockpit cam. the sounds are broken. either its a Marketplace issue or bravo airspace, but it just doesnt work. and if there is sound, it is not good at all, and not same quality as the youtube trailer. how do i check that the pack is enabled correctly? afaik im getting it streamed but there could be a conflict with the default sounds