I had a very similar issue - I was doing 65 on the NJ turnpike and the car hesitated for a split second, then the dash showed the dreaded PULL OVER SAFELY - Vehicle Shutting Down warning. At the bottom, it said "Power Reduced - OK to Drive. Front motor temporarily disabled".
It was NOT Ok to drive. I pulled over, and the vehicle would not start. While on with support we went through all of the recommended reboots (both knobs down, using the shutdown button on the menu, getting out for a few minutes, etc.) with no luck.
I had it towed on Thursday I may get it back next week. They said some major electrical component (not the motor).
I'm asking them to replace all 3 of these bad components. I know, "good luck" - but I've read enough threads to believe that this is a systemic failure and I'm not going to wait around for the other 2 motors to have related failures.
Note these error codes (typing out here so google can index them: Dl_a138 and Dl_a063
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