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_get_interface maybe process one command twice #3659
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line 261 ~ 265 in ud_core.c/usbdevice_core.c maybe process the command in setup twice if the request code is the same with USB_REQ_GET_INTERFACE which is 0xA. It will result in unexpected behavior during transfer. The solution is removing line 261 ~ 265.
I ran into this issue with _interface_handler() in hid.c after the get_interface request is received.
the request code is 0xA which the definition is USB_REQ_GET_INTERFACE and USB_HID_REQ_SET_IDLE.
This issue exists in the implementation of set_interface request also.