When I try to claim the fourth interface, it fails with NOT_SUPPORTED error, and I believe this is due to the number of channels available being only 8, as defined in components/hal/include/hal/usbh_hal.h:
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#define USBH_HAL_NUM_CHAN 8
Secondly, am I to right assume that the only work-around would be to use a custom version of the SDK?