If you're in float and losing steering it's because the resistance the bucket (and/or it's edge, doesn't matter) is getting is great enough that the tractor and FEL "folds" at the loader arms pivot pins raising (or taking weight off of) front tires. That is: The back tires push forward, the bucket wants to stay, so front tires raise up. The resistance the bucket (and/or edge) meets is great because: Your either pushing a lot of heavy wet snow that's heavy enough to raise front end, or caused by having the bucket tilted too far forward crating more drag than if bucket edge was more parallel with the driveway, or by the addition of the edge.
When looking at the picture that shows edge from side: As snow piles on, seems like the snow would push (lever) the edge more into the driveway, creating more slide resistance and stress on cylinders. What is the purpose of the 3" curb under the edge? Why not remove it? I'd originally assumed the "snow edge" was just an "edge" (the yellow part, not the grey part).
....also.. "Epstien didn't kill himself & tilted buckets bend cylinders!" Sorry...couldn't resist