Looks like the issue is solved. It appears that the previous owner hit a curb or something quite hard with the left rear wheel. It shifted the subframe slightly and bent the control arm.
On dry roads there was enough resistance on the rubber that it didn't slip but as soon as it hit slippery the left wheel that was out of alignment would slip causing the swaying. I assume the tires were wearing badly which is why they put the new tires on it before selling the vehicle.
Wasn't super expensive to repair. Alignment is good and runs nice and straight on ice now.
It is an AWD, the tires are Nexen 245 - 60R18 105v M&S. Not sure if those are good quality or not. The look almost brand new.
I have a feeling someone replaced the tires thinking it would fix the wandering on snow covered roads but it didn't help. They ended up just selling the vehicle instead checking more.
Could it possibly be some sensor in the AWD causing uneven power to the wheels?
I recently purchased a used 2019 Ford Edge. It has been fine driving until we got our first cold & snow today.
It drives fine on dry roads but as soon as I got onto some slippery areas it became difficult to steer/control properly. It felt like I was sliding sideways a bit.
Anyone have any ideas? I assume maybe something to do with the AWD drive or TC sensors?