i was just testing my plugin with Reaper and the there available formats AU, VST and VST3. When I load the plugin as VST3 or AU, it receives an update on the new channel count after changing the channel count of the track it is loaded into. Not so with VST. Anyone knows if it is Reapers fault or something in the Juce code?
Btw. with the Juce Pluginhost it seems to work with VST…