The question shouldn't be about delay in the process due to a webform query (though it shouldn't add to any delay); you need to correct any mistake you made in your form if you know it's wrong or incomplete. The webform request will add detail to your file and ensure consistency with whatever shows up on a background check.
I agree with the previous response that regardless of whether it does or doesn't cause delay, you need to correct the record. I don't think there is enough information for anyone to say with any certainty whether or not a delay would occur.