My daughters 2015 started having the same issue - shutting off while turning at low rpm’s. I cleaned all grounds as the Service bulletin suggests, but also cleaned the 2 main grounds on the engine, drivers side, one just above the vacuum pump. Coincidentally she had just had the vacuum pump replaced before it started shutting off. I suspect the ground was taken off and not clean when it was put back on. Anyway, problem solved, not sure which of the many grounds was the problem.
https://static.nhtsa.gov/odi/tsbs/2017/MC-10113356-9999.pdf