DRV8243H-Q1EVM: Output voltage slightly drops periodically

Hello, Team,

We have 2 questions related to DRV8243-Q1 and its EVM.

1. Customer found out that there is a periodical voltage drop when using DRV8243H-Q1EVM:
   
   Frequency is 2.5kHz and the device is in a full-bridge operation. VM = 18V supplied from a stable power supply.
   Every 1.284 sec, there is a slight voltage drop as seen in the above figure.
   
   What would be the reason? Can we fix this?
   
   
2. When VM pin = 0V but nFAULT pin pulled up with 10kOhm, is it ok with this condition which current flows?

Best Regards,
Masaru