Thanks Yamming,
It is good to know that the same setup is working for you. This could point to a problem with something I am doing. I am out of office for a few days, but now I suspect maybe my 24 volt power supply could be inducing some noise or I have something else going on. I expect that you added the 0.1uF capacitors to your DRV8323 board for C9, C10, and C11?
I will try a different power supply and start looking at the signals with a scope as well on Monday and let you guys know what I find.