The reason I asked was because the bike would go to "ready" state in 1-2 seconds initially when I first got it. Since the Charge Tank installation one month later it seems to have these long delays of what you are calling "Precharge". I do hear the connectors switch right away when turning the key on, but the green ready light keeps blinking for 4-8 seconds afterwards along with the display showing multiple bar up and down movements before it goes steady green and I can power the bike forward.
I have not had a charge tank to test, but this is good to know.
The principle is that the motor controller, battery, and any attached chargers have capacitor banks. Pre-charge equalizes the voltage across the contactor before shutting to prevent spike currents as capacitor banks transfer charge instantly.
Adding the charge tank or supercharger mean that pre-charge has more capacitor banks to charge up before the BMS will allow closing the contactor.
Your symptom description is maybe confused. While the green ready light is blinking, the bike should not make a cogging noise when rolling the wheels, and the throttle should not work. These are the most immediate effects of the contactor being open.