It is the protocal in the AFM that IO must review your GC basis during N400 process. So IO will see that your are EB principal and check if you worked for the sponsor after GC. If you never worked for the sponsor, it will be a red flag that IO must react. if you leave too soon, you should prepare for a reason, and as long as it is reasonable, IO will not be that picky. AFM only instructs IO to check whether direct beneficiary worked for the sponsor, it doesn't matter whether the title or pay meeting LC.