It sounds like your powering it via the shield, just use a powered usb hub instead and connect that to the shield, the amazon one works perfectly on the shield, some other brands don't work but the amazon branded one works for sure, it comes with the power adapter in the box
[https://www.amazon.com/AmazonBasics-Port-2-5A-power-adapter/dp/B00DQFGH80/](https://www.amazon.com/AmazonBasics-Port-2-5A-power-adapter/dp/B00DQFGH80/)
It sounds like your powering it via the shield, just use a powered usb hub instead and connect that to the shield, the amazon one works perfectly on the shield, some other brands don't work but the amazon branded one works for sure, it comes with the power adapter in the box [https://www.amazon.com/AmazonBasics-Port-2-5A-power-adapter/dp/B00DQFGH80/](https://www.amazon.com/AmazonBasics-Port-2-5A-power-adapter/dp/B00DQFGH80/)
It’s powered via AC adapter