Zuki, I agree, I have that problem with my Pa900, it's generally only a problem when playing chords with the right hand, but I have to be very conscious of it when I do!

Do you find it better with the Pa3X? I've heard people say it's the same keyboard action.
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Graham, Korg Pa1000, Korg G1 Air, Countryman E6, Roland BA330, 2 x Roland CM-30, , Mackie SRM150