On Sharp and Benning in the morning, John Talman from Rivals was co-hosting with Damon Benning and gave an explanation about this bump. According to Talman, Mike Farrell (recruiting national recruiting director for Rivals) was talking with Talman at the 5-star challenge in Atlanta, GA about some of the talent in the Midwest and Farrell brought up Nick without being asked saying that he loved his film. Rivals had ranking meetings recently and a lot of analysts liked Nick after reevaluating film, so he got the ranking increase.
Talman said that the ranking analyst ultimately wants to be right, that's regarding college career and NFL draft, so coaches, school success, film, competition, and other factors that impact their evaluation and ratings given to players. Coaches and their history of talent evaluation and development definitely make an impact on ratings. Frost with QB's, for instance, is an example John Talman used, with Oregon and UCF QB's results on the field (Marriota, Vernon Adams, Darron Thomas, and McKenzie Milton more recently).