Euro-Reef Pump Impeller Damage

[saltwater-virgin]

I have a RS-180 in sump skimmer that is running a Gen-x 4100 needle wheel pump. It would not start yesterday after unplugging it. I took it apart to clean it and noticed a crack in the magnetic portion on the impeller. The crack is actually in what appears to be a plastic coating on the magnetic. The pink line on the attached picture outlines where I saw the crack. It’s almost as if whatever is under the plastic was swollen.
After cleaning when I plugged it back in it started. Today I unplugged it again and it would not restart. I left it for about an hour and tried again and it started.

Has anyone else experienced this with the Euro-Reef impellers? Do I need to purchase the complete Euro-Reef needle wheel impeller ($75 USD) to fix this or is there another option?