[Sustain] object not working like real piano pedal

Hello,

I want to use a midi keyboard and a midi sustain pedal to play a synth. I wan't to manage the sustain inside of max, so that note on and note off messages are sent to the synth (and not the sustain pedal itself).

For that the [sustain @repeatmode 1] object is almost perfect. BUT if I play a note, activate the sustain, play that note again (retrigger it) and then release the sustain, that note is turned off. Even though I am still pressing it down on my midi keyboard. On a real piano that note would continue to sound, because I am still holding the key down. And not release/ stop sounding just because I deactivated the sustain pedal.

Any help with this would be greatly appreciated, I tried for many hours now to make that work, but I wasn't able to do it.

Greetings, Lennard