Cantabile 5 build 3653: issues with Halion VST3 plugins

I’m having an issue with the current Steinberg Halion 6 and Sonic 3 plugin’s. These are VST3 rather than VST2. They load up in Cantabile properly but won’t make any sounds. I’ve verified MIDI routing and Audio setups. If I run the plugins outside of Cantable as stand alone apps, they work properly. I can live with running the Steinberg instruments in stand alone mode. I was just wondering if anyone else has mentioned something like this.