Hello,

Sorry for the issues you are having. Does this occur in any Cubase session you use? Are you sending a lot of MIDI data to the H9000?

Does this occur if you use a simple blank Cubase session and only automate 1 parameter on the H9000?

An alternative to sending CC automation is to use Emote as a plug-in and automate the functions on the H9000. This may work better for your setup. More information can be found here: https://cdn.eventideaudio.com/manuals/h9000/2.0/content/emote/plugin.html#function-automation