Experiences with a dip in GPA during first semester senior year?

In my case it isn’t major, a few B’s sitting on a track record of A’s, but I know there are some out there who may also want to know: Do you think it has a significant impact against things like already high SAT’s or decent other parts of the application? And also, for early action schools for which I was deferred, is this especially harmful? Since this is basically the only difference between my application then and my application during the regular round unless I send something supplemental (not sure how the whole “we want to reconsider you in the larger RD applicant pool” logic works out here…)
Thanks.