Looks like people have submitted their own data and ABRP revised down the charging curve.
forum.abetterrouteplanner.com

Real World Charging Data for the Bolt, Kona, Niro, Soul, and Leaf
Thanks to all who have contributed data to help improve the planner! Without you, we wouldn't be able to plan routes with such accuracy. We've finally achieved enough data (and I finally had time to sit down and analyze it!) to produce updated real-world charging models for many of the EVs you've...