Startup Delay in DRV8302

Hi Fellow Members

I have been using DRV8302 for quite sometime. I recently changed my MOSFET to IRFS7734 (Qg=180nC, Typical). I noticed a startup delay of typical 1~2 sec. This startup delay occurs only when DRV8302 is switched on after being switched off for long time (1hr). 

How to avoid this delay?? Any Suggestion/Solution will be helpful.

P.S: My Bootstrap capacitance value is 220nF. (If it is any help).

Thanks in Advance

Imthiaz