Ducati Panigale V4 S Transmission Woes

I am currently building the Ducati Panigale V4 S (42202) and am experiencing transmission behavior that can only be described as erratic, even after debugging and rebuilding. I've rebuilt the transmission from scratch four times, following the directions exactly from the booklet, including gear placement and starting alignment and shift drum letter alignment, starting position, and orientation (built in neutral and confirmed working at that point). Very infrequently, from a fully locked...