Sustain Pedal Cancels out the Polyphonic Mode on Modo Bass

[PAULBROWNAP1963]

Whenever I sustain a note using a sustain Pedal, on on Modo Bass, the bass becomes monophonic.

Is there a way to sustain notes using a sustain pedal without canceling out the polyphonic mode on Modo Bass 1 & 2?

Best wishes and many thanks,
Bro Paul