[techdragon]

I suspect it’s a hard real-time, timing/synchronicity type issue between multiple systems. System A responsible for motor control and System B responsible for power management, both need to talk to each other and talk to System C for flight control, and even with bugs fixed, the hardware watchdog timer may not get a response fast enough from A,B, and C in order to meet the deadlines necessary for system safety.

The percentage represents the probability that multiplying the variance in response timing of all the systems will result in the conditions that produce the watchdog timing error will occur.