update here from OP: since having the battery terminal fix I described, I have not had the same issue I originally described where all the bike’s electronics would go dark.
I have experienced where the engine cuts out from a quick blip of the throttle when I have the clutch pulled in and I’m downshifting
I also just had my clutch cable snap on me. Got the clutch cable replaced (about to talk to Husqvarna about reimbursing me for that), and going to keep an eye on the engine cut out problem. Maybe the clutch cable fraying/stretching was causing some weird engagement during downshifting which caused the cut outs. Otherwise I’ll try to look into the ignition sensor malfunction that Aerthyen describes