DRV8323R: SHx inputs completely blown up

Part Number:DRV8323R

Hi,

My design is a DRV8323RS centered design with a µcontroller supporting SPI communication and I/O driving.

I'm using the internal buck to generate a 5V (which is enabled but no significant current is drawn in the problem I'm facing).

The schematic is based on datasheets' information for a 1-sense resistor control:

I'm hooking a 24V power supply and a 150W 24V brushless DC motor phase to my board.

It worked fine during a few days of playing but now I had two nasty blow ups:

We can easily spot the inputs 9 and 16 (SHA and SHB) completely burned out.

It happened at least once during chip SPI reprogramming; could chip configuration/re-configuration lead to this behavior? What could?

Thanks,

Tibo