I had the exact same feel when test driving it. It has problems cornering and driving in winter conditions.
It also has a "snow mode" to help with particularly bad roads. I found at least one review that puts its snow handling down as a "pro", so it's not just me. [1]
I did get the Limited AWD with the 20" wheels. Not sure if that makes a difference.
Still, I’ve never had a car lose grip like the Ioniq 5. For the FWD cars that is expected, but also the RWD I have is easier to handle.