[LAU] bristol synths hang

[Renato]

Hello,
I starte playing around with bristol synths, which look and sound very
cool so far, but I'm having a problem. It happens many times that a
particular note "hangs" on the synth, and sending note off events
doesn't stop it... I have to restart the program, which makes it
unusable since it happens quite often. Untill now this happenede with
b3, minimoog and dx7.

Does anyone experience similar problems?

BTW I'm "playing" the synths with jack-keyboard and pressing the
keys in the GUI with the mouse. 

renato