Sequencing the player "HOLD" stacks notes instead of overwriting the last?

long time op1 and field user here who finally pulled the trigger on the xy. sorry if I’m just missing something or if its a known bug. but I could not really find anything regarding my issue.

When I enable HOLD on a melodic track and play a series of notes by hand using the keyboard, each new note makes the last one stop. thats what i expect and also what the guide on te website says.

Now without changing anything, when I sequence the same 3 notes lets say on step 1, 5 and 9, instead of each note playing in isolation, they stack and are all playing at the same time, which is neither what i want, nor what I expect.

wheres the difference to playing it live here? am I missing something or is this another bug?

is it even the same for you?