Ikea Shortcut button OTA update always fails

That was actually a typo. You only want to use USB 2.0 for a Zigbee Coordinator. Read → Zigbee network optimization: a how-to guide for avoiding radio frequency interference + adding Zigbee Router devices (repeaters/extenders) to get a stable Zigbee network mesh with best possible range and coverage by fully utilizing Zigbee mesh networking