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BQ24193: Fault register REG09 always showing 0x80 after power cycle

Part Number: BQ24193

Hi,

We note that REG09 is always set to 0x80 (= Watchdog timer expiration) after power cycling the IC. Is this the expected behavior, or what could be the cause?

At boot our SW disables the watchdog (to avoid ending up with the default charging current due to a watchdog reset), so it will not expire in that sense. However, simply enabling it and disabling it again (as a test) does not set REG09 = 0x80. Nor does setting REG01 = 0x5B (reseting). 

We are aware we can handle this by simply reading REG09 once to make it go to 0x00, but would like to understand what is causing the 0x80 fault to begin with.

Thanks!