Hi Heather. No matter how reliable, any make/model vehicle can and will have issues with one thing or another.
This is not an inherent, widespread "software issue" that needs to be "updated". It is a defect which occurs in a small amount of vehicles, just like any other defect. It is the same case with any automotive problem, whether it is with the engine, transmission, power windows, air conditioning, audio system, power seats, etc. etc. etc.
Short story is there is no widespread issue with the system.
The vast majority of vehicles work correctly, but there will always be vehicles with a defect which may need to be fixed. That is what the warranty is for.
Also, keep in mind that automotive forums, this one included, will always have an inordinate amount of complaints about the vehicle. The reality is that many/most people come to forums looking for advice and solutions to a problem. Very few people are on forums to tell us how wonderful their vehicles are, or just to help others with common vehicle interests. In this case, Lincolns.
But if you go to forums for Lexus, Infiniti, Hyundai,
Genesis,
Cadillac, BMW, Mercedes etc, it will be the same story. Problems, problems, problems...lol.
So don't let the horror stories get to you. They may seem like a majority on online forums, but they are a tiny minority in reality.
Good luck with whatever you decide to do.