H1B transfer - working with old employer

[kumaraxg]

Hello

I am working with company A and filed for a H1 transfer to company B in premium processing. I joined Company B with the receipt notice and worked for a week, and got a "Request For Evidence". Now I have a question,

If I decide to continue to work with my old employer, Company A, irrespective of whether the transfer is accepted or denied, is it legal?

This is urgent, can you please clarify.