Strange losing of Midi from keyboard

Hello everyone!

I would be very happy if someone could help me with the following problem! I am already quite desperate!

If I play the middle G via my keyboard connected via Midi, it either doesn't work at all or hangs (sound does not end).

And here it comes: any other software has no problems of this kind! Garage-Band for example plays the G without any problems, other programs as well. So it's not the keyboard or the cable or the midi interface, but Logic!

What can it be? What can I do?

Thank you very much for your help!

Greetings from Zippo!