Hello RickBeec,
We identified two separate fan-related issues.
The first one was where the fan ran a little too high, causing a higher background noise factor than previous NUCs. The BIOS release v0024 made adjustments to the fan speed controls that should have helped with that.
The second issue, which you are describing, has not yet been fully investigated - we have some units now undergoing failure analysis. I'd suggest you contact Intel Customer Support at Intel® NUC Email Support Form and request a replacement NUC.
Lois