IOMCU Processor Reset in Mid Flight and caused of air vehivle crashed

The mid-flight altitude of the air vehicle was approximately 36 meters. It encountered “Internal Errors 0x1000” during the flight, and after the crash, the message “PreArm: Internal errors 0x1000 l:133 iomcu_reset” was observed.
What is the cause of the reset of the IOMCU Processor?