H4 EAD approved then I-140 revoked

[a1989]

Hi

I wanted to ask about the following situation regarding H4 EAD :-

I got 140 from Employer A. Applied H4 EAD, got approved. Then moved to Employer B. Then Employer A revoked 140. What happens to the already approved H4 EAD?

Can you please clarify?

Thanks much