Tiger 800 Tiger 900 Gt Shift Assist / Quickshifter

I just bought a 2023 Tiger 900 GT (not Pro, low ride height, without QS). I purchased the Shift Assist parts and had dealer install it at the 600 mile service. When I drove it the QS worked fine on downshifts, and upshifts at light to moderate throttle. However, at heavier throttle at any rpm the ignition cutoff was a full 1/4 second (~250 milliseconds), enough to rock my head forward and squat the front shocks, before the engine caught again. I'm not subconsciously reducing throttle, but holding steady / heavy throttle. The Bazzaz aftermarket QS has software that allows users to adjust the ignition cutoff time in milliseconds between each pair of gears. Dealer claims to have not heard of this problem but wants me to bring it in to re-install software, but its a 3+ hour drive to the dealer through Atlanta traffic. I've posted this on ADVRider, but with no good answers yet.
Is anyone else having this problem? I've read on this forum that more miles to break in transmission will help. Also re-aligning the shift arm might help. Does anyone know if the Triumph dealer computer allows modification of ignition cutoff times? Any other ideas?


UPDATE: My local dealer (not Triumph authorized) has lots of experience with many bikes. He told me to re-do the QS install procedure, which the steps seemed too simple to be true, but it worked! Now, most of the time, it works very well, up and down. Occasionally I'll get a clunky shift, but almost always it's silky smooth at any throttle application or RPM level. I typically only use the clutch at stop signs, but I use the clutch sometimes just to keep that skill sharp. But if you adjust the height of the the shift lever (like for new boots), you should do the install procedure again. None of this makes sense to the engineer in me, but if it works I will quit obsessing over it and enjoy the ride.