Latest VST3 SDK. VSTGUI 3.6, Plugin uses internal presets using the parameter with flag kIsProgramChange
There is another parameter with flag ParameterInfo::kIsBypass
When this bypass parameter value changes (initiated from the plugin editor itself) the bypass processing icon does not change in VSTHostchecker.
All other parameters change correctly.
In Cubase, Sonar, Carla, FL Studio (all latest versions) this works correctly.
Any further idea on this or can Steinberg confirm this is indeed an issue in vsthostchecker ?
I have added in the hostchecker plugin GUI the bypass button to be control from its own UI and fix in the next update version of the plugintesthost the Bypass controlling which was not fully implemented.