Worst case scenario of employer finding out you live abroad

Say you have a US remote job and have been living abroad for more than a year without telling your employer. You have a good VPN setup so you are undetectable. You also file FEIE so you get tax refund equivalent to any earned income taxed bellow 120k current max (20k). And pay local taxes (if needed).

Everything going well BUT then somehow your employer notices this. What’s the worst possible scenario here?