Software updates are pesky things now a days. It's possible that a software update could fix, but I really think something is killing the electrical system. I think that is why you get all the warnings as the network dies and sometimes it extends to the engine controls.
Just to rule out anything in the steering assembly, find a big parking lot and start doing circles. Slowly tighten the circle until you're at full steering wheel lock. Go both ways. If you don't get anything there, go back to where it does happen. Try it over and over again, but with different things on/off. Heater, blower, radio, headlights, heated steering wheel, etc. And see if any of that changes anything.
Anything unusual, odd, different about the location that it does happen at? Anything cell phone towers or anything? Note time of day, all that. If you can provide the shop with anything useful, it could save yourself some money or you could figure it out.