The coppy (when in play mode) doesn't work.
From the manual:
The active pattern can be copied to either another location in the same bank or to a location in another
bank. To perform a pattern copy operation, GRID RECORDING mode must be deactivated. Copy the
pattern by pressing [FUNC] + [RECORD]. Select another pattern and paste the copied pattern to this location
by pressing [FUNC] + [STOP]. The operation can be undone by pressing [FUNC] + [STOP] again.
Clear a pattern by pressing [FUNC] + [PLAY]. Undo the operation by repeating the key presses.
After selecting a pattern, and before releasing any key, [RECORD], [PLAY] and [STOP] can be pressed
to copy, clear or paste patterns.
It's impossible to copy a pattern from, lets say 1 to 2 if the sequencer is running.
I'm assuming this is a bug cause it's a very basic feature among any drum machine or sequencer.