Lost communication with MCU 'nhk' Nitehawk keeps disconnecting

[KastenTaco]

My Nitehawk keeps disconnecting about an hour into each print. At this point I have checked all connectors multiple times, made sure things don't overheat (47C max temperature), re-flashed Klipper, replaced the RPI, and tried a new USB cable. All to no avail. It seems somewhat random, and I am at a loss.

Are there any known hardware or quality issues with the board itself? This is the only component I can not test and verify.