Hello Neo38m, I'm sorry for the inconvenience you have faced when trying to installed an image on new NUCs.
It is very important to let you know that we support "stand along installations". Fos us , if you are able to installed the operating system, with all required drivers and it is working fine, means that the NUC is workings as expected.
If you are still going to use an image on the new NUCs, try reliable image software.
These types of installations can cause many issues similar to the one you are reporting. This is not due to an incorrect functionality of the NUC. Bear in mind that this procedure is out of our scope.
Thanks for your understanding.