DRV8301: DRV8301 related issues

Tool/software:

Hello,

Two MCUs control four motors. When 4 motors are working simultaneously, quickly increase the speed of 2 motors or increase the speed of 4 motors at the same time, and 1 motor will stop urgently. The nFault pin is pulled low, and there is an under Voltage error when reading the register. The attachment is a schematic diagram. Please help analyze the cause and review if there are any issues with the schematic diagram. Thank you!

e2e.ti.com/.../0763.DRV8301.pdf