Hey thanks for reaching out about this. This is the first time this has been reported, so it may take some troubleshooting. I'm gonna throw a list of questions at you - some of them might seem dumb, but bear with me!
- What version of MacOS are you using?
- What audio interface driver are you using?
- What kind of MIDI controller are you using?
- Are you using the VST2, VST3, or AU version of the plugin?
- What's your buffer size set to?
- Can you check if there are any error messages in your DAWs' logs?
- Have you checked the MIDI monitor to see if signals are being sent/received correctly?
This stuff should help get closer to an understanding of what's going on and hopefully get a solution in order!