So I've had issues with my 5950x/MB causing random restarts and WHEA errors for the past month, which thankfully appears to have finally been fixed from a BIOS update yesterday.
Out of curiosity, I also wondered if this BIOS update fixed the fans turning off briefly/lights flickering regularly with iCue on... this is not the case.
Shocking it seems to have been an issue for a long time and there's still no resolution for it. My solution has been to just adjust settings in iCue, save the settings, set iCue to not boot on startup, close it and never touch it, but seems a shame iCue can never be used in this state, especially disappointing for when you want to update the firmware.