Yes, just about any epoxy floor without some sort of anti-slip is going to be slippery with snow melt. There are a few anti-slip additives that you can add to a topcoat however that will help reduce this tremendously.
I added "Shark Grip" to the clear on my floor. Even when it is convered with melting snow you cannot slip on this floor. Without it you would bust your as* in a heartbeat.