Why does my mustang have a rough idle when stopped?

What is your question?

The car has a rough idle at time whenever I come to a complete stop. The RPMs do fluctuate a bit but its not dramatic. The car has even shut off multiple times after it idles rough after a few seconds. I've seen it also seem to trigger it at times once I go into reverse. I have tried an Oil change and cleaning the MAF sensor but nothing has helped and its getting worse as time passes.

How long has your 2019 Ford Mustang had this problem?

Few Months