There are too many facts that are not described in your question and I am confused as to why you call your employer a client. You should consult with an attorney individually.
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Yes, there will be a problem. For some time you were in violation of your status. Diligent US consul would not approve.
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Ideally a amendment should be filed to update new location and client. Depending on the Consulate, there may be a denial of visa in addition notice of intent to revoke can be sent to the employer.
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