Still a big topic with SF2 not working for many people. Luckily the support gave me access to the original rgc:audio sfz+ pro because i own the Sonar X2 version. This plugin is very unstable and only works in pr32 and not sf32 mode but hey at least it loads up any SF2 with full control.
So still searching for a USEFUL Plug to load up SF2 not SFZ with all its parameters inside. So hard to convert all old songs from Cakewalk to Reason because of stability is far better there.