I'm typing this on the maxed out 2016 MBP too, which has given me an orchestra of kernel panics, RAM alerts, beachballs, program crashes, Touchbar glitches and a plethora of accidental mistakes due to the ridiculous size of the trackpad. Experiences vary.
I hope you didn't restore from an early backup. I had a friend who restored from a Time Machine backup on a new hardware and all sorts of crazy stuff happened. As soon as he did a clean install, no problems. If clean install didn't help, then you have a bad hardware. Send it in for repair and if it failed 3 times in a row, get a full refund as hopefully, you should be covered by the lemon law.
Regardless, this has nothing to do with DDR3/DDR4 standards.