DRV8800 / Short nFAULT output at the edge of nSLEEP

Hi All,

Now my customer has  evaluated DRV8800 on their evaluation board and then they found the short nFUALT output at the edge of nSLEEP as attached. I'd like to know if this behavior is known operation. And if so, please let me know the typical period of this nFAULT output at both rise and fall edge of nSLEEP.

Best Regards,

Sonoki / Japan Disty