actually, when you press keys while holding the data encoder, you don’t directly “write” the note/chord
you just put it on a momentary memory
you have to release all the keys (and the data encoder) then you can select the steps where you want this note/chord to be
same thing to enter notes/chords via an external controller except you have to activate the option in the settings
( settings/MISC/ STEP LEARN -> LEARN NOTES )