How to fix Logic Pro note cutting off issue in real time?

Which brand and model keyboard are you using? Make sure you're using a Class Compliant USB cable for your connections. Cheap USB cables will cause unstable communications and if it happened on your last computer I would bet on that instead of a bug in Logic. You can get a USB 3.0 Type-C to Type-B Gold Plated from Monoprice on Amazon for $11.

If you still encounter problems after making sure your cable is class compliant.

1. Try bypassing control surfaces under Logic Pro>Control Surfaces then open Control Surfaces>Setup and see if there are any devices listed. Remove all devices.
2. Navigate to Settings> MIDI> Reset Messages : Check boxes under external and software instruments settings for these control numbers and settings.

• 123
• 121
• 64
• 4
• Aftertouch To Zero
• Send Used Instrument Settings on Reset.

Restart your computer if that doesn't work with your MIDI Keyboard unplugged.

Plug it back in

3. Go to System Audio/MIDI Setup

Spotlight (CMD+Space) to Audio/MIDI Setup

Open MIDI studio (CMD+2) Click the refresh Arrow beside the Keyboard icon on the MIDI Studio bar.

Double check your IAC Drivers and MIDI Keyboard Settings. Open IAC Drivers - if you have more than one port listed, click the minus button until you only have 1. Check the device is online box. Click apply.

if you have tried to set your buffer size to 1024, then it is not your computer struggling to process. Is your midi keyboard connected directly to your computer? Some people connect to their USB hub and it can cause issues.

Can you change your Mic Mode to Standard?

Can you change your buffer size to 1024?

I am glad this solved it for you. Cheers!