Just in case anybody's interested - I uploaded a new beta version of VSTHost (and SAVIHost, if anyone uses that for VST3 PlugIn testing) to http://www.hermannseib.com/programs/beta/
this morning that should only send parameter changes to the editor in the UI thread.
If anybody (well, maybe except Dave, whom I've already notified directly ) could try that one, I'd be grateful.
Thanks Arakula. I tried the beta. Something seems off with the parameter ids. When I log a parameter id on parameter change, the beta shows me the wrong ids for some parameters. The same plugin in the current SAVIHost shows the correct ids.