Please allow me to chime in here. The problem is real, not a misunderstanding.
The sustain pedal is helpful for legato playing chord sequences where fingering doesn't allow to play legato other than using both hands.
What happens with B3-X is: You release the pedal, then shortly AFTER that play the new chord. When you do this, it happens that the new chord is "incomplete", some of the played notes are missing (not sounding).
IMHO, there is one "golden rule" one should be safe to rely on: When a key is down, the corresponding note should sound. Due to that B3-X sustain pedal problem, this rule is broken.
I already submitted this to IK technical support and received a reply that this is a known problem. They didn't tell whether or not this will be fixed, or whether or not this is on priority.
I would really wish to hear that a fix is on the way. THANK YOU VERY MUCH