Based on some other things I saw - though admittedly looked at only quickly - it seems that the Mach E 'stop safely' problem is indeed hardware and that any software fix will just be a temporary one to try to minimize the problem until they get the hardware sorted out. I heard also that they are stopping deliveries, with no immediate prospect of restarting and that a solution is not expected until Q3. Not a good situation for Ford (or for the reputation of EVs generally). As I suggested previously, Ford rushed the Mach E.