Proraso best before date

I just found some at shoppers nearby and picked it up since it was only 6$:tu, and when reading the sides it says it's only good for 12 months after opening. I thought this was weird since it's a soap and I thought soaps didn't go bad! and comparing with my C&E cream that says it's good for 24 months I'm confused why it wouldn't last as long! :shrug:

Has anyone had any trouble with it lasting long? not that I intend for it to last longer than a year but just out of curiosity!