I am also facing similar issue with form 8962 since late February. My form 8962 details are

1. 3

2a. 87,058

2b 0

3. 87,058

4. 21,720

5. 400%

I believe Line 5 should be 401.82 % but proseries is calculating it at 400% and hence the rejection error . I don't see any option to override this either.