COS from H4 to H1 when H4 extension is in progress(Both happeing around the same time interval)

I had H1B from Employer A. After the project got over, I applied for COS from H1 to H4 and it got approved as well. However, that H4 approval was valid till 9/9.

My husband’s employer filed H1 Extension for him with my H4 extension as well. That is still in progress (It was filed around July 20th normal processing). Now, I an offer from the same client again and there is Employer B who is willing to do COS for me in premium processing.

Is there a risk factor involved in this? I am not sure if the H4 extension gets approved first or the premium processing COS from H4 to H1 will get approved first. Is there a way we can make the COS from H4 to H1 work?