EB-2 to EB-3 downgrade, 180 day cycle reset?

I have my original i-140 approved under EB-2 with PD of May 2015. Just got my EB3 i-140 also approved on 2/10 with same employer.
If I now move to a new employer before 180 days, will I lose my Priority Date of May 2015 ?

Thanks!