This anomaly applies to IC Rev. Engineering B, build codes QDAA-BC0.
The USBD might behave unexpectedly.
USBD is enabled for the first time after a reset (USBD.ENABLE=1).
When enabling the USBD for the first time after a reset, disable and re-enable. Wait for the status signal NRF_USBD->EVENTCAUSE set to USBD_EVENTCAUSE_READY after enabling, then disable and re-enable.