Z3TA+ - Mod wheel stops current note

Hi,
 
Has anyone else noticed this, or is it a problem with my setup?
 
If I'm playing a note in Z3TA+ and move the mod wheel up to the top (127), the note stops playing. It plays at all values up to 126, but stops when the wheel hits 127. If I then press the key again (with the mod wheel still at 127) the note sounds. Happens in both the standalone and VST versions.
 
Wondering if I've inadvertently set something up wrong, or if it's a problem specific to my controller / setup.
 
Should be easy enough to test, and would really appreciate any feedback.
 
Thanks in advance!