VEPro AUv3 with Logic 10.7.3 now exhibit normal MIDI Note Off function on all 48 VEPro ports.
Previously, using Logic 10.7.0, 10.7.1 or 10.7.2 with VEPro AUv3, in half of the VEPro ports all MIDI Notes were left hanging without their Note Offs. Apple have fixed this in 10.7.3.
In testing this functionality I used:- Logic Pro 10.7.3; VEPro AUv3 7.0.1120; VSL Synchron Player 1.1.2063; NI Kontakt 6.7.0; macOS 12.3 Monterey; external Samsung X5 2TB SSD boot volume via TB3; 2017 5K iMac, 4.2GHz i7 7700K, 64GB, Radeon Pro 580 8GB.
I'll be testing this latest Logic with VEPro AUv2 using VSL's original multiport workaround next and will post results asap.