We have a 2018 and it to has been trouble free too. I bought an aftermarket auto start/stop bypass, however, in my discussions with the service manager at the dealer, he recommended I did not install it as he had an Enclave that installed an after market device and it messed up the main computer so we did not install it.
Simple solution, at least for the six speed, drive the car in L and toggle and leave the transmission in 6. L automatically bypasses the auto start / stop and the car shifts as normal as if it is in drive. I now do this automatically.