Doepfer

I love my Doepfer setupp and really have very little to gripe 
about.  However, my A-190 has always bothered me because of the way 
it responds to receiving more than one note at a time.  If I play 
one note one the keyboard, press a second note while still holding 
the first and then release the second note while still holding the 
first, the gate signal will cut off and the note CV will stay at the 
second note.
  This is different from the way analog monosynths react, and also 
different from the way every other digital synth I own reacts when 
in mono mode.  On every other analog and digital synth, when the 
second note is released, the note CV will revert to the held first 
note, and the gate will stay on until the first note is released.  
   The way the 190 reacts makes it difficult to play and often 
forces me to use another midi to CV box.  This is a pity, because 
everything else about the 190 is so well thought out and well geared 
toward keyboard playing. 
  Maybe this is because the 190 was one of the first modules to be 
released.  Is there any chance that this could one day be updated in 
the firmware for the unit?  Would changing this be a big job?  Has 
there already been an update I don't know about?