Is that tractor and loader new?
Looks like they didn't weld any bosses to give more area for the pin to spread the forces and are only relying on the thickness of the plate. It will get worse over time and it will happen on the other pins as well.
Unfortunately manufacturers tend to skip welding bosses on the loaders for SCUTs for some reason.
Yup, brand new as a month ago.
Time to contact the dealer and see what he says and do about that. It's indeed not acceptable on a brand new tractor.