Which driver are you using? I use a different controller but with the asio4all v2 driver - http://www.asio4all.org/
Are you using the Piano default with your controller?
What version of MM are you using? Is it premium,plus or free? 2020,2019 or earlier?
If your version supports VSTS, have you disabled them during your testing? Are you using any other hardware during your testing? If Yes, disable any additional sound hardware and just use the bare bones sound card on your PC.
Can you send screen shots of your program audio/midi settings?