I tried to duplicate yesterday and did not experience it. When I let the car slow to a stop, after about 5 seconds I got a message in the HUD to select resume when ready to restart. If I ignored it and gave it gas, the cruise control cancelled and it accelerated normally. If I hit the resume button, it continued with the adaptive control.
In fairness to OP, I didn't select Cancel. Namely because it never crossed my mind, and I couldn't remember the sequence OP was experiencing the problem with.
Congratulations should be in order, and yet I feel it's really too bad you had to go through that at all, and ultimately give up on the Corsair. Whatever was causing that behaviour *should* have been fixable, frankly.