I tried a search and could not find any similar posts.
In Cubase 13 on macOS 14.1, when I open the chord pads to try to experiment with chords and progressions, when the key signature selected offers an Ab chord and Eb chord, they both play back the same chord. Going back and forth between them, plays the same thing.
After experimenting, the issue was with the Sound sample.
Choosing HS SE Pro, sound Electro Buzz, is where the issue lies. When I change the instrument, it seems to work. However, Electro Buzz plays it incorrectly.
Thanks. I chose the sound. by hitting my MIDI keyboard notes. Spent several moments messing with stuff, then opened the chord pads and never put to 2 and 2 together.
I recognized I never stop to truly play the sound. After trying to play chords, I see that you are 100% correct.
Also, for anyone in the future, if you scroll to the far right, you can see the words monophonic. Or you can see some other information about the sound.