I suggest checking that each "manual" is (still) sending on a distinct midi channel. The encoder in the console may have changed its settings (for some reason) or developed a fault.
You can use the HW midi logging or another program (for example MidiMedi (on a PC) https://www.midiworks.ca/index.php/downloads or Midiox http://www.midiox.com/ on a PC or a MAC) to check this out.
Iain