This message was posted on behalf of Intel Corporation
Thank you for joining the Intel® NUC Community. I am sorry to hear you are having a Bluetooth issue.
Since the issue is also present with a different operating system, it could be a hardware related behavior. The wireless card in this model is embedded, so in that case the whole unit needs to be replaced.
Please contact us directly in order to check the warranty options for your Intel® NUC, find the contact information here: Contact Support