Clutch judder and GRA with malfunction

Hello,

'For about a month now, I've been experiencing a problem where the clutch jerks slightly when starting from a standstill, especially when the engine is cold.' In warm water, it's either not there or present in such a small amount that I don't notice it.
'For the past two days, I've also been having an issue with my GRA (presumably a graphics card or similar device). It randomly disconnects from time to time, but I can usually reactivate it immediately.'
My AXR has been chip-tuned, but I can't really imagine that the clutch is completely worn out, because it's not slipping or exhibiting any other malfunctions besides the occasional jerking.

What do you think it could be? Engine mount? Is it a faulty speed sensor for the transmission? Or could it be a defective clutch, but if so, why the problems with the GRA (presumably a specific system or component)?

I'm still seeing the following error in memory after the GRA malfunctioned:

18097 - Powertrain Data Bus: Implausible message from Central Electronics 35-10 - - - Intermittent